diff --git a/cde/programs/dthelp/parser.ccdf/htag/build/build.c b/cde/programs/dthelp/parser.ccdf/htag/build/build.c
index 0fce96e78..6183275b7 100644
--- a/cde/programs/dthelp/parser.ccdf/htag/build/build.c
+++ b/cde/programs/dthelp/parser.ccdf/htag/build/build.c
@@ -31,9 +31,6 @@ This product and information is proprietary of Tandem Computers Incorporated.
 
 #include <string.h>
 #include <stdlib.h>
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include "context.h"
 #define BUILDEF
 #include "build.h"
diff --git a/cde/programs/dthelp/parser.ccdf/htag/build/out.c b/cde/programs/dthelp/parser.ccdf/htag/build/out.c
index e2503cea0..a13b2dcf3 100644
--- a/cde/programs/dthelp/parser.ccdf/htag/build/out.c
+++ b/cde/programs/dthelp/parser.ccdf/htag/build/out.c
@@ -31,9 +31,6 @@ This product and information is proprietary of Tandem Computers Incorporated.
 
 #include <string.h>
 #include <stdlib.h>
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include "context.h"
 #include "build.h"
 #include "delim.h"
diff --git a/cde/programs/dthelp/parser.ccdf/htag/build/scan.c b/cde/programs/dthelp/parser.ccdf/htag/build/scan.c
index df96b1370..362d831bc 100644
--- a/cde/programs/dthelp/parser.ccdf/htag/build/scan.c
+++ b/cde/programs/dthelp/parser.ccdf/htag/build/scan.c
@@ -30,9 +30,6 @@ This product and information is proprietary of Tandem Computers Incorporated.
 /* Scan.c contains scanner procedures for program BUILD */
 
 #include <string.h>
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include "build.h"
 #define M_CONDEF
 #include "context.h"
diff --git a/cde/programs/dthelp/parser.ccdf/htag/eltdef/eltdef.c b/cde/programs/dthelp/parser.ccdf/htag/eltdef/eltdef.c
index 2ffd8b065..46506ecf2 100644
--- a/cde/programs/dthelp/parser.ccdf/htag/eltdef/eltdef.c
+++ b/cde/programs/dthelp/parser.ccdf/htag/eltdef/eltdef.c
@@ -32,9 +32,6 @@ This product and information is proprietary of Tandem Computers Incorporated.
 #include <stdio.h>
 #include <string.h>
 #include <stdlib.h>
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include "basic.h"
 #include "trie.h"
 
diff --git a/cde/programs/dthelp/parser.ccdf/htag/eltdef/eltutil.c b/cde/programs/dthelp/parser.ccdf/htag/eltdef/eltutil.c
index d5684d984..b83887531 100644
--- a/cde/programs/dthelp/parser.ccdf/htag/eltdef/eltutil.c
+++ b/cde/programs/dthelp/parser.ccdf/htag/eltdef/eltutil.c
@@ -32,9 +32,6 @@ This product and information is proprietary of Tandem Computers Incorporated.
 #include <stdio.h>
 #include <string.h>
 #include <stdlib.h>
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include "basic.h"
 #include "trie.h"
 
diff --git a/cde/programs/dthelp/parser.ccdf/htag/eltdef/scan.c b/cde/programs/dthelp/parser.ccdf/htag/eltdef/scan.c
index 654986ba9..ab10a6527 100644
--- a/cde/programs/dthelp/parser.ccdf/htag/eltdef/scan.c
+++ b/cde/programs/dthelp/parser.ccdf/htag/eltdef/scan.c
@@ -31,9 +31,6 @@ This product and information is proprietary of Tandem Computers Incorporated.
 
 #include <stdio.h>
 #include <string.h>
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include "basic.h"
 #include "trie.h"
 
diff --git a/cde/programs/dthelp/parser.ccdf/htag/helptag/custom.c b/cde/programs/dthelp/parser.ccdf/htag/helptag/custom.c
index 8c992f71a..f39f88017 100644
--- a/cde/programs/dthelp/parser.ccdf/htag/helptag/custom.c
+++ b/cde/programs/dthelp/parser.ccdf/htag/helptag/custom.c
@@ -32,15 +32,6 @@ Copyright (c) 1988, 1989 Hewlett-Packard Co.
 #include "globdec.h"
 #include <stdlib.h>
 
-
-#if defined(MSDOS)
-/* Standard startup code doesn't have room to load inherited environments
-   in some cases.  Since they're not used, don't bother.  (Using Microsoft
-   C compiler).  */
-void _setenvp(void);
-void _setenvp(){}
-#endif
-
 /* Write input file and line number for an error message */
 void m_dumpline(file, line)
 M_WCHAR *file;
@@ -92,9 +83,6 @@ for ( ; *p ; p++)
     }
 }
 
-#if defined(MSDOS)
-#include <process.h>
-#endif
 /* Write error message suffix */
 void m_esuffix(void)
 {
diff --git a/cde/programs/dthelp/parser.ccdf/htag/helptag/global.h b/cde/programs/dthelp/parser.ccdf/htag/helptag/global.h
index fed443896..65d32f1bd 100644
--- a/cde/programs/dthelp/parser.ccdf/htag/helptag/global.h
+++ b/cde/programs/dthelp/parser.ccdf/htag/helptag/global.h
@@ -35,11 +35,6 @@
 
 #include <stdlib.h>
 #include <string.h>
-#if defined(MSDOS)
-#include <io.h>
-#include <process.h>
-#include <direct.h>
-#endif
 #include <ctype.h>
 
 #if defined(hpux) || defined(_AIX) || defined(sun) || defined(__linux__) || defined(CSRG_BASED)
@@ -153,9 +148,6 @@ EXTERN LOGICAL filelist INIT(FALSE) ;
 
 /* NOTE: If driver is redimensioned, a change is needed in texinit() */
 EXTERN char driver[20]
-#if defined(MSDOS)
-  INIT("CDS") 
-#else
 #if defined(hpux)
   INIT("HPUX")
 #endif
@@ -167,7 +159,6 @@ EXTERN char driver[20]
 #endif
 #if defined(sun)
   INIT("SUN")
-#endif
 #endif
   ;
 
@@ -191,14 +182,10 @@ struct search {
 EXTERN SEARCH *path INIT(NULL) ;
 EXTERN SEARCH **endpath INIT(&path) ;
 EXTERN char dirsep
-#if defined(MSDOS)
-INIT('\\')
-#else
 #if defined(hpux) || defined(_AIX) || defined(sun)
 INIT('/')
 #else
 ****define directory separator here****
-#endif
 #endif
   ;
 
@@ -206,13 +193,8 @@ INIT('/')
 #define CSEP '/'
 #define SSEP "/"
 #else
-#if defined(MSDOS)
-#define CSEP '\\'
-#define SSEP "\\"
-#else
 ****define directory separator here****
 #endif
-#endif
 
 /* Location in .TEX file of two \wlog messages */
 EXTERN long wlog ;
diff --git a/cde/programs/dthelp/parser.ccdf/htag/helptag/help.c b/cde/programs/dthelp/parser.ccdf/htag/helptag/help.c
index e3b2c77c1..981fa80ba 100644
--- a/cde/programs/dthelp/parser.ccdf/htag/helptag/help.c
+++ b/cde/programs/dthelp/parser.ccdf/htag/helptag/help.c
@@ -139,18 +139,6 @@ void basename(void)
        ) filelist = TRUE;
 
     /* Get installation directory */
-#if defined(MSDOS)
-    for (p = m_argv[0]; *p ; p++);
-    for (; ; p--)
-      if (*p == dirsep || *p == ':') break;
-    p++;
-    save = *p;
-    *p = M_EOS;
-    install = m_malloc(strlen(m_argv[0]) + 1, "installation directory");
-    strcpy(install, m_argv[0]);
-    *p = save;
-
-#else
 #if defined(hpux) || defined(_AIX) || defined(sun) || defined(__linux__)
 #define CONTRIB "/usr/hphelp/bin/"
 
@@ -230,16 +218,12 @@ void basename(void)
 
 #else
  Get installation directory
-#endif
 #endif
 
     /* Set default working directory (from input filename) */
     for (p = strchr(m_argv[1], M_EOS); p > m_argv[1] ; p--)
-      if (*(p - 1) == dirsep
-#if defined(MSDOS)
-          || *(p - 1) == ':'
-#endif
-          ) break;
+      if (*(p - 1) == dirsep)
+        break;
     if (p > m_argv[1]) {
       save = *p;
       *p = M_EOS;
@@ -2213,18 +2197,11 @@ while (name = m_cyclent(init, &type, &content, &wheredef))
 	}
     }
 
-#if defined(MSDOS)
-m_openchk(&nullfile, "NUL", "w");
-#else
 #if defined(hpux) || defined(_AIX) || defined(sun) || defined(__linux__)
 m_openchk(&nullfile, "/dev/null", "w");
 #else
 m_openchk(&nullfile, "nullfile", "w");
 #endif
-#endif
-#if defined(MSDOS)
-#else
-#endif
 
 idxupdate = ftell(outfile);
 
diff --git a/cde/programs/dthelp/parser.ccdf/htag/helptag/help.if b/cde/programs/dthelp/parser.ccdf/htag/helptag/help.if
index 5e3ad6aab..4919b94e3 100644
--- a/cde/programs/dthelp/parser.ccdf/htag/helptag/help.if
+++ b/cde/programs/dthelp/parser.ccdf/htag/helptag/help.if
@@ -172,9 +172,6 @@
   <\CODE>
 
 <!ENTITY m-machine SDATA CODE>
-#if defined(MSDOS)
-  m_piaction("VECTRA", "m-machine", M_SDATA) ;
-#else
 #if defined(hpux)
   {
   M_WCHAR *wc_1, *wc_2;
@@ -213,7 +210,6 @@
 	     M_SDATA) ;
 #endif
 #endif
-#endif
 #endif
   <\CODE>
 
diff --git a/cde/programs/dthelp/parser.ccdf/htag/helptag/make.c b/cde/programs/dthelp/parser.ccdf/htag/helptag/make.c
index 8a4fb052b..b53a1647c 100644
--- a/cde/programs/dthelp/parser.ccdf/htag/helptag/make.c
+++ b/cde/programs/dthelp/parser.ccdf/htag/helptag/make.c
@@ -31,11 +31,6 @@
    or invoke function pointers should be in tex.c.
 */
 
-#if defined(MSDOS)
-#include <sys\types.h>
-#include <sys\stat.h>
-#endif
-
 #if defined(hpux) || defined(_AIX) || defined(sun)
 #include <sys/types.h>
 #include <sys/stat.h>
diff --git a/cde/programs/dthelp/parser.ccdf/htag/helptag/option.c b/cde/programs/dthelp/parser.ccdf/htag/helptag/option.c
index 3a5d65adc..f16728e84 100644
--- a/cde/programs/dthelp/parser.ccdf/htag/helptag/option.c
+++ b/cde/programs/dthelp/parser.ccdf/htag/helptag/option.c
@@ -294,11 +294,7 @@ if (! *string)
 switch (thisopt)
     {
     case SEARCHKEY:
-	if ( (parentsrch==TRUE) && (*string!=M_EOS) && (*string!=dirsep)
-#if defined(MSDOS)
-	 && ( *(string+1) != ':' )
-#endif
-      )
+	if ( (parentsrch==TRUE) && (*string!=M_EOS) && (*string!=dirsep) )
 	    {
 	    /* prepend "..", for index processing in temporary sub-directory */
 	    tempstr = (char *) m_malloc( strlen(string) + 4, "tempstr search");
@@ -314,11 +310,7 @@ switch (thisopt)
 
 	*endpath = (SEARCH *) m_malloc(sizeof(SEARCH), "search path");
 	p = strchr(tempstr, M_EOS);
-	if (p != tempstr && *(p - 1) != dirsep
-    #if defined(MSDOS)
-	      && *(p - 1) != ':'
-    #endif
-	   )
+	if (p != tempstr && *(p - 1) != dirsep)
 	    {
 	    i = strlen(tempstr);
 	    (*endpath)->directory = (char *) m_malloc(i + 2,
diff --git a/cde/programs/dthelp/parser.ccdf/htag/parser/actutil.c b/cde/programs/dthelp/parser.ccdf/htag/parser/actutil.c
index e6ea15291..e1a2240b2 100644
--- a/cde/programs/dthelp/parser.ccdf/htag/parser/actutil.c
+++ b/cde/programs/dthelp/parser.ccdf/htag/parser/actutil.c
@@ -32,9 +32,6 @@ in the interface definition.*/
 
 #include <stdio.h>
 #include <stdlib.h>
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include <string.h>
 #include "basic.h"
 #include "trie.h"
diff --git a/cde/programs/dthelp/parser.ccdf/htag/parser/entity.c b/cde/programs/dthelp/parser.ccdf/htag/parser/entity.c
index c974d7b5a..48757aa15 100644
--- a/cde/programs/dthelp/parser.ccdf/htag/parser/entity.c
+++ b/cde/programs/dthelp/parser.ccdf/htag/parser/entity.c
@@ -32,9 +32,6 @@ This product and information is proprietary of Tandem Computers Incorporated.
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include "basic.h"
 #include "trie.h"
 #include "context.h"
diff --git a/cde/programs/dthelp/parser.ccdf/htag/parser/error.c b/cde/programs/dthelp/parser.ccdf/htag/parser/error.c
index ce5dba918..e05d6b440 100644
--- a/cde/programs/dthelp/parser.ccdf/htag/parser/error.c
+++ b/cde/programs/dthelp/parser.ccdf/htag/parser/error.c
@@ -32,9 +32,6 @@ This product and information is proprietary of Tandem Computers Incorporated.
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include "basic.h"
 #include "trie.h"
 #include "dtdext.h"
diff --git a/cde/programs/dthelp/parser.ccdf/htag/parser/esuffix.c b/cde/programs/dthelp/parser.ccdf/htag/parser/esuffix.c
index ddcb99892..d6cdc38e5 100644
--- a/cde/programs/dthelp/parser.ccdf/htag/parser/esuffix.c
+++ b/cde/programs/dthelp/parser.ccdf/htag/parser/esuffix.c
@@ -27,9 +27,6 @@ Copyright 1988, 1989 Hewlett-Packard Co.
 
 #include "userinc.h"
 #include "globdec.h"
-#if defined(MSDOS)
-#include <process.h>
-#endif
 
 /* Write error message suffix */
 void m_esuffix(void)
diff --git a/cde/programs/dthelp/parser.ccdf/htag/parser/exit.c b/cde/programs/dthelp/parser.ccdf/htag/parser/exit.c
index 6383fcb95..d2e4d2056 100644
--- a/cde/programs/dthelp/parser.ccdf/htag/parser/exit.c
+++ b/cde/programs/dthelp/parser.ccdf/htag/parser/exit.c
@@ -27,9 +27,6 @@ Copyright 1988, 1989 Hewlett-Packard Co.
 
 #include "userinc.h"
 #include "globdec.h"
-#if defined(MSDOS)
-#include <process.h>
-#endif
 
 /* Default version of PARSER m_exit().  Allows interface control if
    internal error causes PARSER to halt. */
diff --git a/cde/programs/dthelp/parser.ccdf/htag/parser/minim.c b/cde/programs/dthelp/parser.ccdf/htag/parser/minim.c
index 4bfcee79d..5742bc5a9 100644
--- a/cde/programs/dthelp/parser.ccdf/htag/parser/minim.c
+++ b/cde/programs/dthelp/parser.ccdf/htag/parser/minim.c
@@ -31,9 +31,6 @@ This product and information is proprietary of Tandem Computers Incorporated.
 
 #include <stdio.h>
 #include <string.h>
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include "basic.h"
 #include "trie.h"
 #include "dtdext.h"
diff --git a/cde/programs/dthelp/parser.ccdf/htag/parser/param.c b/cde/programs/dthelp/parser.ccdf/htag/parser/param.c
index 4eff40629..c5250a57a 100644
--- a/cde/programs/dthelp/parser.ccdf/htag/parser/param.c
+++ b/cde/programs/dthelp/parser.ccdf/htag/parser/param.c
@@ -32,9 +32,6 @@ This product and information is proprietary of Tandem Computers Incorporated.
 #include <string.h>
 #include <stdio.h>
 #include <stdlib.h>
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include "basic.h"
 #include "trie.h"
 #include "delim.h"
diff --git a/cde/programs/dthelp/parser.ccdf/htag/parser/parutil.c b/cde/programs/dthelp/parser.ccdf/htag/parser/parutil.c
index 41e3f206a..b9f436866 100644
--- a/cde/programs/dthelp/parser.ccdf/htag/parser/parutil.c
+++ b/cde/programs/dthelp/parser.ccdf/htag/parser/parutil.c
@@ -33,9 +33,6 @@ This product and information is proprietary of Tandem Computers Incorporated.
 #include <stdio.h>
 #include <stdlib.h>
 #include <locale.h>
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include "basic.h"
 #include "trie.h"
 #include "dtdext.h"
diff --git a/cde/programs/dthelp/parser.ccdf/htag/parser/scan.c b/cde/programs/dthelp/parser.ccdf/htag/parser/scan.c
index 7b61380ab..d6ab9060d 100644
--- a/cde/programs/dthelp/parser.ccdf/htag/parser/scan.c
+++ b/cde/programs/dthelp/parser.ccdf/htag/parser/scan.c
@@ -32,9 +32,6 @@ This product and information is proprietary of Tandem Computers Incorporated.
 #include <string.h>
 #include <stdlib.h>
 #include <stdio.h>
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include "basic.h"
 #include "trie.h"
 #define M_CONDEF
diff --git a/cde/programs/dthelp/parser.ccdf/htag/parser/struct.c b/cde/programs/dthelp/parser.ccdf/htag/parser/struct.c
index 09dd0d035..a7de300b7 100644
--- a/cde/programs/dthelp/parser.ccdf/htag/parser/struct.c
+++ b/cde/programs/dthelp/parser.ccdf/htag/parser/struct.c
@@ -33,9 +33,6 @@ This product and information is proprietary of Tandem Computers Incorporated.
 #include <string.h>
 #include <stdio.h>
 #include <stdlib.h>
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include "basic.h"
 #include "trie.h"
 #include "dtdext.h"
diff --git a/cde/programs/dthelp/parser.ccdf/htag/util/context.c b/cde/programs/dthelp/parser.ccdf/htag/util/context.c
index 9f3237d2f..1f92a699b 100644
--- a/cde/programs/dthelp/parser.ccdf/htag/util/context.c
+++ b/cde/programs/dthelp/parser.ccdf/htag/util/context.c
@@ -157,9 +157,6 @@ delim.h.
 
 #include <stdio.h>
 #include <stdlib.h>
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include "basic.h"
 #include "trie.h"
 
diff --git a/cde/programs/dthelp/parser.ccdf/htag/util/conutil.c b/cde/programs/dthelp/parser.ccdf/htag/util/conutil.c
index fcee06cdf..e30308c12 100644
--- a/cde/programs/dthelp/parser.ccdf/htag/util/conutil.c
+++ b/cde/programs/dthelp/parser.ccdf/htag/util/conutil.c
@@ -31,9 +31,6 @@ This product and information is proprietary of Tandem Computers Incorporated.
 #include <stdio.h>
 #include <string.h>
 #include <stdlib.h>
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include "basic.h"
 #include "trie.h"
 
diff --git a/cde/programs/dthelp/parser.ccdf/htag/util/emptyfil.c b/cde/programs/dthelp/parser.ccdf/htag/util/emptyfil.c
index dc56ffc0c..90493d922 100644
--- a/cde/programs/dthelp/parser.ccdf/htag/util/emptyfil.c
+++ b/cde/programs/dthelp/parser.ccdf/htag/util/emptyfil.c
@@ -24,9 +24,6 @@
 /* Copyright (c) 1988, 1989 Hewlett-Packard Co. */
 /* Creates a file with nothing in it */
 #include <stdio.h>
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include "basic.h"
 
 void main(int argc, char **argv)
diff --git a/cde/programs/dthelp/parser.ccdf/htag/util/exit.c b/cde/programs/dthelp/parser.ccdf/htag/util/exit.c
index bc9a12c12..2fb2dc435 100644
--- a/cde/programs/dthelp/parser.ccdf/htag/util/exit.c
+++ b/cde/programs/dthelp/parser.ccdf/htag/util/exit.c
@@ -25,9 +25,6 @@
 Copyright 1988, 1989 Hewlett-Packard Co.
 */
 
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include "basic.h"
 
 void m_exit(int status);
diff --git a/cde/programs/dthelp/parser.ccdf/htag/util/fclndir.c b/cde/programs/dthelp/parser.ccdf/htag/util/fclndir.c
index 7fc2aa147..77a4e8078 100644
--- a/cde/programs/dthelp/parser.ccdf/htag/util/fclndir.c
+++ b/cde/programs/dthelp/parser.ccdf/htag/util/fclndir.c
@@ -37,9 +37,6 @@ with an error code of 0 if the files are the same, 1 if they differ, and
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include "basic.h"
 #define SAME 0
 /* different defined to be 0 as of 12-1-89, because fclndir now does
@@ -122,11 +119,7 @@ void copyfile(pfile1,pfile2)
 /* malloc space for the system command: two filenames, plus a command,
    spaces, and the terminating null */
 	pcmd = (char *) malloc(strlen(pfile1) + strlen(pfile2) + 8);
-#if defined(MSDOS)
-	ret = sprintf(pcmd,"copy %s %s",pfile1,pfile2);
-#else
 	ret = sprintf(pcmd,"cp %s %s",pfile1,pfile2);
-#endif
 	ret = system(pcmd);
 	ret = sprintf(pcmd,"touch %s",pfile2);
 	ret = system(pcmd);
diff --git a/cde/programs/dthelp/parser.ccdf/htag/util/inctest.c b/cde/programs/dthelp/parser.ccdf/htag/util/inctest.c
index 9f25e667e..f2dbba3ee 100644
--- a/cde/programs/dthelp/parser.ccdf/htag/util/inctest.c
+++ b/cde/programs/dthelp/parser.ccdf/htag/util/inctest.c
@@ -25,9 +25,6 @@
                    Copyright 1986, 1987, 1988, 1989 Hewlett-Packard Co.
 */
 
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include "basic.h"
 
 void m_err1(const char *text, const char *arg);
diff --git a/cde/programs/dthelp/parser.ccdf/htag/util/malloc.c b/cde/programs/dthelp/parser.ccdf/htag/util/malloc.c
index 343d11225..7e99cd3bc 100644
--- a/cde/programs/dthelp/parser.ccdf/htag/util/malloc.c
+++ b/cde/programs/dthelp/parser.ccdf/htag/util/malloc.c
@@ -28,9 +28,6 @@
 /**/
 #include <stdlib.h>
 #include <stdio.h>
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include "basic.h"
 
 extern LOGICAL m_heapchk ;
@@ -58,9 +55,6 @@ void m_free(block, msg)
   {
     char buffer[32] ;
 
-#if defined(MSDOS)
-    if (m_heapchk) m_heapdump() ;
-#endif
     if (m_malftrace) {
 #if defined(hpux) || defined(_AIX) || defined(sun)
       sprintf(buffer, "%5x:%5x",
@@ -75,46 +69,8 @@ void m_free(block, msg)
       m_trace("\n") ;
       }      
     free(block) ;
-#if defined(MSDOS)
-    if (m_heapchk) m_heapdump() ;
-#endif
     }
 
-#if defined(MSDOS)
-void m_heapdump(void)
-  {
-    struct _heapinfo hinfo ;
-    int heapstatus ;
-
-    heapstatus = _heapchk() ;
-    if (heapstatus == _HEAPOK || heapstatus == _HEAPEMPTY) return ;
-    printf("\nDumping heap:\n") ;
-    hinfo._pentry = NULL ;
-    while ((heapstatus = _heapwalk(&hinfo)) == _HEAPOK) 
-      printf("%6s block at %p of size %4.4X\n",
-             hinfo._useflag == _USEDENTRY ? "USED" : "FREE",
-             hinfo._pentry, hinfo._size) ;
-    switch(heapstatus) {
-      case _HEAPEMPTY:
-        printf("OK - empty heap\n\n") ;
-        break ;
-      case _HEAPEND:
-        printf("OK - end of heap\n\n") ;
-        break ;
-      case _HEAPBADPTR:
-        printf("Error - bad pointer to heap\n\n") ;
-        break ;
-      case _HEAPBADBEGIN:
-        printf("Error - bad start of heap\n\n") ;
-        break ;
-      case _HEAPBADNODE:
-        printf("Error - bad node in heap\n\n") ;
-        break ;
-      }
-    m_exit(TRUE) ;
-    }
-#endif
-
 void *m_malloc(size, msg)
   int size ;
   char *msg ;
@@ -123,14 +79,8 @@ void *m_malloc(size, msg)
     void *p ;
 
     size *= sizeof(M_WCHAR);
-#if defined(MSDOS)
-    if (m_heapchk) m_heapdump() ;
-#endif
     if (! size) return(NULL) ;
     p = (void *) malloc(size) ;
-#if defined(MSDOS)
-    if (m_heapchk) m_heapdump() ;
-#endif
     if (! p) {
       m_errline("Unable to allocate space for ") ;
       m_errline(msg) ;
@@ -164,14 +114,8 @@ void *m_realloc(ptr, size, msg)
     void *p ;
 
     size *= sizeof(M_WCHAR);
-#if defined(MSDOS)
-    if (m_heapchk) m_heapdump() ;
-#endif
     if (! size) return(NULL) ;
     p = (void *) realloc(ptr, size) ;
-#if defined(MSDOS)
-    if (m_heapchk) m_heapdump() ;
-#endif
     if (! p) {
       m_errline("Unable to re-allocate space for ") ;
       m_errline(msg) ;
diff --git a/cde/programs/dthelp/parser.ccdf/htag/util/openchk.c b/cde/programs/dthelp/parser.ccdf/htag/util/openchk.c
index d5f4b4fc9..327b205db 100644
--- a/cde/programs/dthelp/parser.ccdf/htag/util/openchk.c
+++ b/cde/programs/dthelp/parser.ccdf/htag/util/openchk.c
@@ -26,9 +26,6 @@
 */
 
 #include <stdio.h>
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include "basic.h"
 
 extern FILE *m_errfile ;
diff --git a/cde/programs/dthelp/parser.ccdf/htag/util/trie.c b/cde/programs/dthelp/parser.ccdf/htag/util/trie.c
index 67f790254..16ae146b7 100644
--- a/cde/programs/dthelp/parser.ccdf/htag/util/trie.c
+++ b/cde/programs/dthelp/parser.ccdf/htag/util/trie.c
@@ -31,10 +31,6 @@
 
 #include <stdio.h>
 
-#if defined(MSDOS)
-#include <stdlib.h>
-#endif
-
 #include "basic.h"
 #include "common.h"
 #include "trie.h"
diff --git a/cde/programs/dthelp/parser/canon1/build/build.c b/cde/programs/dthelp/parser/canon1/build/build.c
index 4fe65690a..f13e2927a 100644
--- a/cde/programs/dthelp/parser/canon1/build/build.c
+++ b/cde/programs/dthelp/parser/canon1/build/build.c
@@ -31,9 +31,6 @@ This product and information is proprietary of Tandem Computers Incorporated.
 
 #include <string.h>
 #include <stdlib.h>
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include "context.h"
 #define BUILDEF
 #include "build.h"
diff --git a/cde/programs/dthelp/parser/canon1/build/out.c b/cde/programs/dthelp/parser/canon1/build/out.c
index 5c7dc63c5..28c664cc5 100644
--- a/cde/programs/dthelp/parser/canon1/build/out.c
+++ b/cde/programs/dthelp/parser/canon1/build/out.c
@@ -32,9 +32,6 @@ This product and information is proprietary of Tandem Computers Incorporated.
 #include <string.h>
 #include <stdlib.h>
 #include <ctype.h>
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include "context.h"
 #include "build.h"
 #include "delim.h"
diff --git a/cde/programs/dthelp/parser/canon1/build/scan.c b/cde/programs/dthelp/parser/canon1/build/scan.c
index aa8046405..071f3238a 100644
--- a/cde/programs/dthelp/parser/canon1/build/scan.c
+++ b/cde/programs/dthelp/parser/canon1/build/scan.c
@@ -30,9 +30,6 @@ This product and information is proprietary of Tandem Computers Incorporated.
 /* Scan.c contains scanner procedures for program BUILD */
 
 #include <string.h>
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include "build.h"
 #define M_CONDEF
 #include "context.h"
diff --git a/cde/programs/dthelp/parser/canon1/eltdef/eltdef.c b/cde/programs/dthelp/parser/canon1/eltdef/eltdef.c
index 45540d03d..e8f34f390 100644
--- a/cde/programs/dthelp/parser/canon1/eltdef/eltdef.c
+++ b/cde/programs/dthelp/parser/canon1/eltdef/eltdef.c
@@ -32,9 +32,6 @@ This product and information is proprietary of Tandem Computers Incorporated.
 #include <stdio.h>
 #include <string.h>
 #include <stdlib.h>
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include "basic.h"
 #include "trie.h"
 
diff --git a/cde/programs/dthelp/parser/canon1/eltdef/eltutil.c b/cde/programs/dthelp/parser/canon1/eltdef/eltutil.c
index 266b02330..ee96a26c9 100644
--- a/cde/programs/dthelp/parser/canon1/eltdef/eltutil.c
+++ b/cde/programs/dthelp/parser/canon1/eltdef/eltutil.c
@@ -32,9 +32,6 @@ This product and information is proprietary of Tandem Computers Incorporated.
 #include <stdio.h>
 #include <string.h>
 #include <stdlib.h>
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include "basic.h"
 #include "trie.h"
 
diff --git a/cde/programs/dthelp/parser/canon1/eltdef/scan.c b/cde/programs/dthelp/parser/canon1/eltdef/scan.c
index 3317a955b..d4f8e5815 100644
--- a/cde/programs/dthelp/parser/canon1/eltdef/scan.c
+++ b/cde/programs/dthelp/parser/canon1/eltdef/scan.c
@@ -31,9 +31,6 @@ This product and information is proprietary of Tandem Computers Incorporated.
 
 #include <stdio.h>
 #include <string.h>
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include "basic.h"
 #include "trie.h"
 
diff --git a/cde/programs/dthelp/parser/canon1/helptag/custom.c b/cde/programs/dthelp/parser/canon1/helptag/custom.c
index 27df40ade..ac501530d 100644
--- a/cde/programs/dthelp/parser/canon1/helptag/custom.c
+++ b/cde/programs/dthelp/parser/canon1/helptag/custom.c
@@ -32,15 +32,6 @@ Copyright (c) 1988, 1989 Hewlett-Packard Co.
 #include "globdec.h"
 #include <stdlib.h>
 
-
-#if defined(MSDOS)
-/* Standard startup code doesn't have room to load inherited environments
-   in some cases.  Since they're not used, don't bother.  (Using Microsoft
-   C compiler).  */
-void _setenvp(void);
-void _setenvp(){}
-#endif
-
 /* Write input file and line number for an error message */
 void m_dumpline(file, line)
 M_WCHAR *file;
@@ -92,9 +83,6 @@ for ( ; *p ; p++)
     }
 }
 
-#if defined(MSDOS)
-#include <process.h>
-#endif
 /* Write error message suffix */
 void m_esuffix(void)
 {
diff --git a/cde/programs/dthelp/parser/canon1/helptag/global.h b/cde/programs/dthelp/parser/canon1/helptag/global.h
index e45c04650..4b1335220 100644
--- a/cde/programs/dthelp/parser/canon1/helptag/global.h
+++ b/cde/programs/dthelp/parser/canon1/helptag/global.h
@@ -36,11 +36,6 @@
 #include <stdlib.h>
 #include <string.h>
 #include <time.h>
-#if defined(MSDOS)
-#include <io.h>
-#include <process.h>
-#include <direct.h>
-#endif
 #include <ctype.h>
 
 #if defined(hpux) || defined(_AIX) || defined(sun) || defined(__linux__) || defined(CSRG_BASED)
@@ -175,14 +170,10 @@ struct search {
 EXTERN SEARCH *path INIT(NULL) ;
 EXTERN SEARCH **endpath INIT(&path) ;
 EXTERN char dirsep
-#if defined(MSDOS)
-INIT('\\')
-#else
 #if defined(hpux) || defined(_AIX) || defined(sun) || defined(__linux__) || defined(CSRG_BASED)
 INIT('/')
 #else
 ****define directory separator here****
-#endif
 #endif
   ;
 
@@ -190,13 +181,8 @@ INIT('/')
 #define CSEP '/'
 #define SSEP "/"
 #else
-#if defined(MSDOS)
-#define CSEP '\\'
-#define SSEP "\\"
-#else
 ****define directory separator here****
 #endif
-#endif
 
 /* Location in .TEX file of two \wlog messages */
 EXTERN long wlog ;
diff --git a/cde/programs/dthelp/parser/canon1/helptag/help.if b/cde/programs/dthelp/parser/canon1/helptag/help.if
index 2ea2cf035..6c856cfb7 100644
--- a/cde/programs/dthelp/parser/canon1/helptag/help.if
+++ b/cde/programs/dthelp/parser/canon1/helptag/help.if
@@ -144,9 +144,6 @@
   </CODE>
 
 <!ENTITY m-machine SDATA CODE>
-#if defined(MSDOS)
-  m_piaction("VECTRA", "m-machine", M_SDATA) ;
-#else
 #if defined(hpux)
   {
   M_WCHAR *wc_1, *wc_2;
@@ -185,7 +182,6 @@
 	     M_SDATA) ;
 #endif
 #endif
-#endif
 #endif
   </CODE>
 
diff --git a/cde/programs/dthelp/parser/canon1/helptag/make.c b/cde/programs/dthelp/parser/canon1/helptag/make.c
index dd5d7f7e9..5c6ab8ef0 100644
--- a/cde/programs/dthelp/parser/canon1/helptag/make.c
+++ b/cde/programs/dthelp/parser/canon1/helptag/make.c
@@ -31,11 +31,6 @@
    or invoke function pointers should be in tex.c.
 */
 
-#if defined(MSDOS)
-#include <sys\types.h>
-#include <sys\stat.h>
-#endif
-
 #if defined(hpux) || defined(_AIX) || defined(sun)
 #include <sys/types.h>
 #include <sys/stat.h>
diff --git a/cde/programs/dthelp/parser/canon1/helptag/option.c b/cde/programs/dthelp/parser/canon1/helptag/option.c
index 006384284..db47515f5 100644
--- a/cde/programs/dthelp/parser/canon1/helptag/option.c
+++ b/cde/programs/dthelp/parser/canon1/helptag/option.c
@@ -294,11 +294,7 @@ if (! *string)
 switch (thisopt)
     {
     case SEARCHKEY:
-	if ( (parentsrch==TRUE) && (*string!=M_EOS) && (*string!=dirsep)
-#if defined(MSDOS)
-	 && ( *(string+1) != ':' )
-#endif
-      )
+	if ( (parentsrch==TRUE) && (*string!=M_EOS) && (*string!=dirsep) )
 	    {
 	    /* prepend "..", for index processing in temporary sub-directory */
 	    tempstr = (char *) m_malloc( strlen(string) + 4, "tempstr search");
@@ -314,11 +310,7 @@ switch (thisopt)
 
 	*endpath = (SEARCH *) m_malloc(sizeof(SEARCH), "search path");
 	p = strchr(tempstr, M_EOS);
-	if (p != tempstr && *(p - 1) != dirsep
-    #if defined(MSDOS)
-	      && *(p - 1) != ':'
-    #endif
-	   )
+	if (p != tempstr && *(p - 1) != dirsep)
 	    {
 	    i = strlen(tempstr);
 	    (*endpath)->directory = (char *) m_malloc(i + 2,
diff --git a/cde/programs/dthelp/parser/canon1/parser/actutil.c b/cde/programs/dthelp/parser/canon1/parser/actutil.c
index 28fabb844..7e4495d50 100644
--- a/cde/programs/dthelp/parser/canon1/parser/actutil.c
+++ b/cde/programs/dthelp/parser/canon1/parser/actutil.c
@@ -32,9 +32,6 @@ in the interface definition.*/
 
 #include <stdio.h>
 #include <stdlib.h>
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include <string.h>
 #include "basic.h"
 #include "trie.h"
diff --git a/cde/programs/dthelp/parser/canon1/parser/entity.c b/cde/programs/dthelp/parser/canon1/parser/entity.c
index 6ace9b34b..f27cf0e71 100644
--- a/cde/programs/dthelp/parser/canon1/parser/entity.c
+++ b/cde/programs/dthelp/parser/canon1/parser/entity.c
@@ -32,9 +32,6 @@ This product and information is proprietary of Tandem Computers Incorporated.
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include "basic.h"
 #include "trie.h"
 #include "context.h"
diff --git a/cde/programs/dthelp/parser/canon1/parser/error.c b/cde/programs/dthelp/parser/canon1/parser/error.c
index 9857cdba8..e83303c2d 100644
--- a/cde/programs/dthelp/parser/canon1/parser/error.c
+++ b/cde/programs/dthelp/parser/canon1/parser/error.c
@@ -32,9 +32,6 @@ This product and information is proprietary of Tandem Computers Incorporated.
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include "basic.h"
 #include "trie.h"
 #include "dtdext.h"
diff --git a/cde/programs/dthelp/parser/canon1/parser/esuffix.c b/cde/programs/dthelp/parser/canon1/parser/esuffix.c
index 6d5d513f8..31b12d8a1 100644
--- a/cde/programs/dthelp/parser/canon1/parser/esuffix.c
+++ b/cde/programs/dthelp/parser/canon1/parser/esuffix.c
@@ -27,9 +27,6 @@ Copyright 1988, 1989 Hewlett-Packard Co.
 
 #include "userinc.h"
 #include "globdec.h"
-#if defined(MSDOS)
-#include <process.h>
-#endif
 
 /* Write error message suffix */
 void m_esuffix(void)
diff --git a/cde/programs/dthelp/parser/canon1/parser/exit.c b/cde/programs/dthelp/parser/canon1/parser/exit.c
index be276f5ff..67952a960 100644
--- a/cde/programs/dthelp/parser/canon1/parser/exit.c
+++ b/cde/programs/dthelp/parser/canon1/parser/exit.c
@@ -27,9 +27,6 @@ Copyright 1988, 1989 Hewlett-Packard Co.
 
 #include "userinc.h"
 #include "globdec.h"
-#if defined(MSDOS)
-#include <process.h>
-#endif
 
 /* Default version of PARSER m_exit().  Allows interface control if
    internal error causes PARSER to halt. */
diff --git a/cde/programs/dthelp/parser/canon1/parser/minim.c b/cde/programs/dthelp/parser/canon1/parser/minim.c
index fffe1fe6c..c18ceb1ea 100644
--- a/cde/programs/dthelp/parser/canon1/parser/minim.c
+++ b/cde/programs/dthelp/parser/canon1/parser/minim.c
@@ -31,9 +31,6 @@ This product and information is proprietary of Tandem Computers Incorporated.
 
 #include <stdio.h>
 #include <string.h>
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include "basic.h"
 #include "trie.h"
 #include "dtdext.h"
diff --git a/cde/programs/dthelp/parser/canon1/parser/param.c b/cde/programs/dthelp/parser/canon1/parser/param.c
index 98446638a..bec0a121d 100644
--- a/cde/programs/dthelp/parser/canon1/parser/param.c
+++ b/cde/programs/dthelp/parser/canon1/parser/param.c
@@ -32,9 +32,6 @@ This product and information is proprietary of Tandem Computers Incorporated.
 #include <string.h>
 #include <stdio.h>
 #include <stdlib.h>
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include "basic.h"
 #include "trie.h"
 #include "delim.h"
diff --git a/cde/programs/dthelp/parser/canon1/parser/parutil.c b/cde/programs/dthelp/parser/canon1/parser/parutil.c
index 58f991ed3..2c321ac9c 100644
--- a/cde/programs/dthelp/parser/canon1/parser/parutil.c
+++ b/cde/programs/dthelp/parser/canon1/parser/parutil.c
@@ -33,9 +33,6 @@ This product and information is proprietary of Tandem Computers Incorporated.
 #include <stdio.h>
 #include <stdlib.h>
 #include <locale.h>
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include "basic.h"
 #include "trie.h"
 #include "dtdext.h"
diff --git a/cde/programs/dthelp/parser/canon1/parser/scan.c b/cde/programs/dthelp/parser/canon1/parser/scan.c
index 2426e65ca..0d2bc240e 100644
--- a/cde/programs/dthelp/parser/canon1/parser/scan.c
+++ b/cde/programs/dthelp/parser/canon1/parser/scan.c
@@ -32,9 +32,6 @@ This product and information is proprietary of Tandem Computers Incorporated.
 #include <string.h>
 #include <stdlib.h>
 #include <stdio.h>
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include "basic.h"
 #include "trie.h"
 #define M_CONDEF
diff --git a/cde/programs/dthelp/parser/canon1/parser/struct.c b/cde/programs/dthelp/parser/canon1/parser/struct.c
index 3130929b1..1b4e526c9 100644
--- a/cde/programs/dthelp/parser/canon1/parser/struct.c
+++ b/cde/programs/dthelp/parser/canon1/parser/struct.c
@@ -33,9 +33,6 @@ This product and information is proprietary of Tandem Computers Incorporated.
 #include <string.h>
 #include <stdio.h>
 #include <stdlib.h>
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include "basic.h"
 #include "trie.h"
 #include "dtdext.h"
diff --git a/cde/programs/dthelp/parser/canon1/util/context.c b/cde/programs/dthelp/parser/canon1/util/context.c
index 5cc87cbec..3e9140306 100644
--- a/cde/programs/dthelp/parser/canon1/util/context.c
+++ b/cde/programs/dthelp/parser/canon1/util/context.c
@@ -157,9 +157,6 @@ delim.h.
 
 #include <stdio.h>
 #include <stdlib.h>
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include "basic.h"
 #include "trie.h"
 
diff --git a/cde/programs/dthelp/parser/canon1/util/conutil.c b/cde/programs/dthelp/parser/canon1/util/conutil.c
index a6ab7a024..375923e86 100644
--- a/cde/programs/dthelp/parser/canon1/util/conutil.c
+++ b/cde/programs/dthelp/parser/canon1/util/conutil.c
@@ -31,9 +31,6 @@ This product and information is proprietary of Tandem Computers Incorporated.
 #include <stdio.h>
 #include <string.h>
 #include <stdlib.h>
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include "basic.h"
 #include "trie.h"
 
diff --git a/cde/programs/dthelp/parser/canon1/util/emptyfil.c b/cde/programs/dthelp/parser/canon1/util/emptyfil.c
index 3672bd085..a3bdc5719 100644
--- a/cde/programs/dthelp/parser/canon1/util/emptyfil.c
+++ b/cde/programs/dthelp/parser/canon1/util/emptyfil.c
@@ -24,9 +24,6 @@
 /* Copyright (c) 1988, 1989 Hewlett-Packard Co. */
 /* Creates a file with nothing in it */
 #include <stdio.h>
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include "basic.h"
 
 void main(int argc, char **argv);
diff --git a/cde/programs/dthelp/parser/canon1/util/exit.c b/cde/programs/dthelp/parser/canon1/util/exit.c
index 96ec73e5b..3991b6180 100644
--- a/cde/programs/dthelp/parser/canon1/util/exit.c
+++ b/cde/programs/dthelp/parser/canon1/util/exit.c
@@ -25,9 +25,6 @@
 Copyright 1988, 1989 Hewlett-Packard Co.
 */
 
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include "basic.h"
 
 void m_exit(int status);
diff --git a/cde/programs/dthelp/parser/canon1/util/fclndir.c b/cde/programs/dthelp/parser/canon1/util/fclndir.c
index 141592714..283befe3a 100644
--- a/cde/programs/dthelp/parser/canon1/util/fclndir.c
+++ b/cde/programs/dthelp/parser/canon1/util/fclndir.c
@@ -37,9 +37,6 @@ with an error code of 0 if the files are the same, 1 if they differ, and
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include "basic.h"
 #define SAME 0
 /* different defined to be 0 as of 12-1-89, because fclndir now does
@@ -124,11 +121,7 @@ void copyfile(pfile1,pfile2)
    spaces, and the terminating null */
 	slen = strlen(pfile1) + strlen(pfile2) + 8;
 	pcmd = (char *) malloc(slen);
-#if defined(MSDOS)
-	ret = snprintf(pcmd, slen, "copy %s %s",pfile1,pfile2);
-#else
 	ret = snprintf(pcmd, slen, "cp %s %s",pfile1,pfile2);
-#endif
 	ret = system(pcmd);
 	ret = snprintf(pcmd, slen, "touch %s",pfile2);
 	ret = system(pcmd);
diff --git a/cde/programs/dthelp/parser/canon1/util/inctest.c b/cde/programs/dthelp/parser/canon1/util/inctest.c
index aca54d1af..096797157 100644
--- a/cde/programs/dthelp/parser/canon1/util/inctest.c
+++ b/cde/programs/dthelp/parser/canon1/util/inctest.c
@@ -25,9 +25,6 @@
                    Copyright 1986, 1987, 1988, 1989 Hewlett-Packard Co.
 */
 
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include "basic.h"
 
 void m_err1(const char *text, const char *arg);
diff --git a/cde/programs/dthelp/parser/canon1/util/malloc.c b/cde/programs/dthelp/parser/canon1/util/malloc.c
index 06800d850..04d28343e 100644
--- a/cde/programs/dthelp/parser/canon1/util/malloc.c
+++ b/cde/programs/dthelp/parser/canon1/util/malloc.c
@@ -28,9 +28,6 @@
 /**/
 #include <stdlib.h>
 #include <stdio.h>
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include "basic.h"
 
 extern LOGICAL m_heapchk ;
@@ -58,9 +55,6 @@ void m_free(block, msg)
   {
     char buffer[32] ;
 
-#if defined(MSDOS)
-    if (m_heapchk) m_heapdump() ;
-#endif
     free(block) ;
     if (m_malftrace) {
 #if defined(hpux) || defined(_AIX) || defined(sun)
@@ -75,46 +69,8 @@ void m_free(block, msg)
       m_trace(msg) ;
       m_trace("\n") ;
       }      
-#if defined(MSDOS)
-    if (m_heapchk) m_heapdump() ;
-#endif
     }
 
-#if defined(MSDOS)
-void m_heapdump(void)
-  {
-    struct _heapinfo hinfo ;
-    int heapstatus ;
-
-    heapstatus = _heapchk() ;
-    if (heapstatus == _HEAPOK || heapstatus == _HEAPEMPTY) return ;
-    printf("\nDumping heap:\n") ;
-    hinfo._pentry = NULL ;
-    while ((heapstatus = _heapwalk(&hinfo)) == _HEAPOK) 
-      printf("%6s block at %p of size %4.4X\n",
-             hinfo._useflag == _USEDENTRY ? "USED" : "FREE",
-             hinfo._pentry, hinfo._size) ;
-    switch(heapstatus) {
-      case _HEAPEMPTY:
-        printf("OK - empty heap\n\n") ;
-        break ;
-      case _HEAPEND:
-        printf("OK - end of heap\n\n") ;
-        break ;
-      case _HEAPBADPTR:
-        printf("Error - bad pointer to heap\n\n") ;
-        break ;
-      case _HEAPBADBEGIN:
-        printf("Error - bad start of heap\n\n") ;
-        break ;
-      case _HEAPBADNODE:
-        printf("Error - bad node in heap\n\n") ;
-        break ;
-      }
-    m_exit(TRUE) ;
-    }
-#endif
-
 void *m_malloc(size, msg)
   int size ;
   char *msg ;
@@ -123,14 +79,8 @@ void *m_malloc(size, msg)
     void *p ;
 
     size *= sizeof(M_WCHAR);
-#if defined(MSDOS)
-    if (m_heapchk) m_heapdump() ;
-#endif
     if (! size) return(NULL) ;
     p = (void *) malloc(size) ;
-#if defined(MSDOS)
-    if (m_heapchk) m_heapdump() ;
-#endif
     if (! p) {
       m_errline("Unable to allocate space for ") ;
       m_errline(msg) ;
@@ -164,14 +114,8 @@ void *m_realloc(ptr, size, msg)
     void *p ;
 
     size *= sizeof(M_WCHAR);
-#if defined(MSDOS)
-    if (m_heapchk) m_heapdump() ;
-#endif
     if (! size) return(NULL) ;
     p = (void *) realloc(ptr, size) ;
-#if defined(MSDOS)
-    if (m_heapchk) m_heapdump() ;
-#endif
     if (! p) {
       m_errline("Unable to re-allocate space for ") ;
       m_errline(msg) ;
diff --git a/cde/programs/dthelp/parser/canon1/util/openchk.c b/cde/programs/dthelp/parser/canon1/util/openchk.c
index 2059c7c04..dabc4bc3b 100644
--- a/cde/programs/dthelp/parser/canon1/util/openchk.c
+++ b/cde/programs/dthelp/parser/canon1/util/openchk.c
@@ -26,9 +26,6 @@
 */
 
 #include <stdio.h>
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include "basic.h"
 
 extern FILE *m_errfile ;
diff --git a/cde/programs/dthelp/parser/canon1/util/trie.c b/cde/programs/dthelp/parser/canon1/util/trie.c
index d32958ec4..dc43f4f1a 100644
--- a/cde/programs/dthelp/parser/canon1/util/trie.c
+++ b/cde/programs/dthelp/parser/canon1/util/trie.c
@@ -31,10 +31,6 @@
 
 #include <stdio.h>
 
-#if defined(MSDOS)
-#include <stdlib.h>
-#endif
-
 #include "basic.h"
 #include "common.h"
 #include "trie.h"
diff --git a/cde/programs/dthelp/parser/pass1/build/build.c b/cde/programs/dthelp/parser/pass1/build/build.c
index 0bca5ab35..f908e5b1e 100644
--- a/cde/programs/dthelp/parser/pass1/build/build.c
+++ b/cde/programs/dthelp/parser/pass1/build/build.c
@@ -31,9 +31,6 @@ This product and information is proprietary of Tandem Computers Incorporated.
 
 #include <string.h>
 #include <stdlib.h>
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include "context.h"
 #define BUILDEF
 #include "build.h"
diff --git a/cde/programs/dthelp/parser/pass1/build/out.c b/cde/programs/dthelp/parser/pass1/build/out.c
index 4db1d5847..1a4e8f0a4 100644
--- a/cde/programs/dthelp/parser/pass1/build/out.c
+++ b/cde/programs/dthelp/parser/pass1/build/out.c
@@ -32,9 +32,6 @@ This product and information is proprietary of Tandem Computers Incorporated.
 #include <string.h>
 #include <stdlib.h>
 #include <ctype.h>
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include "context.h"
 #include "build.h"
 #include "delim.h"
diff --git a/cde/programs/dthelp/parser/pass1/build/scan.c b/cde/programs/dthelp/parser/pass1/build/scan.c
index 7826aa8c0..895c18a1a 100644
--- a/cde/programs/dthelp/parser/pass1/build/scan.c
+++ b/cde/programs/dthelp/parser/pass1/build/scan.c
@@ -30,9 +30,6 @@ This product and information is proprietary of Tandem Computers Incorporated.
 /* Scan.c contains scanner procedures for program BUILD */
 
 #include <string.h>
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include "build.h"
 #define M_CONDEF
 #include "context.h"
diff --git a/cde/programs/dthelp/parser/pass1/eltdef/eltdef.c b/cde/programs/dthelp/parser/pass1/eltdef/eltdef.c
index cd27ab0d3..a1af1f181 100644
--- a/cde/programs/dthelp/parser/pass1/eltdef/eltdef.c
+++ b/cde/programs/dthelp/parser/pass1/eltdef/eltdef.c
@@ -32,9 +32,6 @@ This product and information is proprietary of Tandem Computers Incorporated.
 #include <stdio.h>
 #include <string.h>
 #include <stdlib.h>
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include "basic.h"
 #include "trie.h"
 
diff --git a/cde/programs/dthelp/parser/pass1/eltdef/eltutil.c b/cde/programs/dthelp/parser/pass1/eltdef/eltutil.c
index e4faf649d..9e958bcc9 100644
--- a/cde/programs/dthelp/parser/pass1/eltdef/eltutil.c
+++ b/cde/programs/dthelp/parser/pass1/eltdef/eltutil.c
@@ -32,9 +32,6 @@ This product and information is proprietary of Tandem Computers Incorporated.
 #include <stdio.h>
 #include <string.h>
 #include <stdlib.h>
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include "basic.h"
 #include "trie.h"
 
diff --git a/cde/programs/dthelp/parser/pass1/eltdef/scan.c b/cde/programs/dthelp/parser/pass1/eltdef/scan.c
index d0cda0bbc..811cecd32 100644
--- a/cde/programs/dthelp/parser/pass1/eltdef/scan.c
+++ b/cde/programs/dthelp/parser/pass1/eltdef/scan.c
@@ -31,9 +31,6 @@ This product and information is proprietary of Tandem Computers Incorporated.
 
 #include <stdio.h>
 #include <string.h>
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include "basic.h"
 #include "trie.h"
 
diff --git a/cde/programs/dthelp/parser/pass1/helptag/custom.c b/cde/programs/dthelp/parser/pass1/helptag/custom.c
index 9da131fc7..68412bbd3 100644
--- a/cde/programs/dthelp/parser/pass1/helptag/custom.c
+++ b/cde/programs/dthelp/parser/pass1/helptag/custom.c
@@ -32,15 +32,6 @@ Copyright (c) 1988, 1989 Hewlett-Packard Co.
 #include "globdec.h"
 #include <stdlib.h>
 
-
-#if defined(MSDOS)
-/* Standard startup code doesn't have room to load inherited environments
-   in some cases.  Since they're not used, don't bother.  (Using Microsoft
-   C compiler).  */
-void _setenvp(void);
-void _setenvp(){}
-#endif
-
 /* Write input file and line number for an error message */
 void m_dumpline(file, line)
 M_WCHAR *file;
@@ -92,9 +83,6 @@ for ( ; *p ; p++)
     }
 }
 
-#if defined(MSDOS)
-#include <process.h>
-#endif
 /* Write error message suffix */
 void m_esuffix(void)
 {
diff --git a/cde/programs/dthelp/parser/pass1/helptag/global.h b/cde/programs/dthelp/parser/pass1/helptag/global.h
index 490cd6268..d3b8d2015 100644
--- a/cde/programs/dthelp/parser/pass1/helptag/global.h
+++ b/cde/programs/dthelp/parser/pass1/helptag/global.h
@@ -36,11 +36,6 @@
 #include <stdlib.h>
 #include <string.h>
 #include <time.h>
-#if defined(MSDOS)
-#include <io.h>
-#include <process.h>
-#include <direct.h>
-#endif
 #include <ctype.h>
 
 #include <unistd.h>
diff --git a/cde/programs/dthelp/parser/pass1/helptag/help.if b/cde/programs/dthelp/parser/pass1/helptag/help.if
index d5b487305..aa43e0ccb 100644
--- a/cde/programs/dthelp/parser/pass1/helptag/help.if
+++ b/cde/programs/dthelp/parser/pass1/helptag/help.if
@@ -133,9 +133,6 @@
   <\CODE>
 
 <!ENTITY m-machine SDATA CODE>
-#if defined(MSDOS)
-  m_piaction("VECTRA", "m-machine", M_SDATA) ;
-#else
 #if defined(hpux)
   {
   M_WCHAR *wc_1, *wc_2;
@@ -174,7 +171,6 @@
 	     M_SDATA) ;
 #endif
 #endif
-#endif
 #endif
   <\CODE>
 
diff --git a/cde/programs/dthelp/parser/pass1/helptag/make.c b/cde/programs/dthelp/parser/pass1/helptag/make.c
index e74a56e47..7dfe88931 100644
--- a/cde/programs/dthelp/parser/pass1/helptag/make.c
+++ b/cde/programs/dthelp/parser/pass1/helptag/make.c
@@ -31,11 +31,6 @@
    or invoke function pointers should be in tex.c.
 */
 
-#if defined(MSDOS)
-#include <sys\types.h>
-#include <sys\stat.h>
-#endif
-
 #if defined(hpux) || defined(_AIX) || defined(sun)
 #include <sys/types.h>
 #include <sys/stat.h>
diff --git a/cde/programs/dthelp/parser/pass1/parser/actutil.c b/cde/programs/dthelp/parser/pass1/parser/actutil.c
index 0d6894d71..2d5ee736b 100644
--- a/cde/programs/dthelp/parser/pass1/parser/actutil.c
+++ b/cde/programs/dthelp/parser/pass1/parser/actutil.c
@@ -32,9 +32,6 @@ in the interface definition.*/
 
 #include <stdio.h>
 #include <stdlib.h>
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include <string.h>
 #include "basic.h"
 #include "trie.h"
diff --git a/cde/programs/dthelp/parser/pass1/parser/entity.c b/cde/programs/dthelp/parser/pass1/parser/entity.c
index 89390b016..c81b35f01 100644
--- a/cde/programs/dthelp/parser/pass1/parser/entity.c
+++ b/cde/programs/dthelp/parser/pass1/parser/entity.c
@@ -32,9 +32,6 @@ This product and information is proprietary of Tandem Computers Incorporated.
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include "basic.h"
 #include "trie.h"
 #include "context.h"
diff --git a/cde/programs/dthelp/parser/pass1/parser/error.c b/cde/programs/dthelp/parser/pass1/parser/error.c
index bbea85ead..c93defc5e 100644
--- a/cde/programs/dthelp/parser/pass1/parser/error.c
+++ b/cde/programs/dthelp/parser/pass1/parser/error.c
@@ -32,9 +32,6 @@ This product and information is proprietary of Tandem Computers Incorporated.
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include "basic.h"
 #include "trie.h"
 #include "dtdext.h"
diff --git a/cde/programs/dthelp/parser/pass1/parser/esuffix.c b/cde/programs/dthelp/parser/pass1/parser/esuffix.c
index 6bcf0a6f9..b56151199 100644
--- a/cde/programs/dthelp/parser/pass1/parser/esuffix.c
+++ b/cde/programs/dthelp/parser/pass1/parser/esuffix.c
@@ -27,9 +27,6 @@ Copyright 1988, 1989 Hewlett-Packard Co.
 
 #include "userinc.h"
 #include "globdec.h"
-#if defined(MSDOS)
-#include <process.h>
-#endif
 
 /* Write error message suffix */
 void m_esuffix(void)
diff --git a/cde/programs/dthelp/parser/pass1/parser/exit.c b/cde/programs/dthelp/parser/pass1/parser/exit.c
index 49bed3fd3..e6fe99003 100644
--- a/cde/programs/dthelp/parser/pass1/parser/exit.c
+++ b/cde/programs/dthelp/parser/pass1/parser/exit.c
@@ -27,9 +27,6 @@ Copyright 1988, 1989 Hewlett-Packard Co.
 
 #include "userinc.h"
 #include "globdec.h"
-#if defined(MSDOS)
-#include <process.h>
-#endif
 
 /* Default version of PARSER m_exit().  Allows interface control if
    internal error causes PARSER to halt. */
diff --git a/cde/programs/dthelp/parser/pass1/parser/minim.c b/cde/programs/dthelp/parser/pass1/parser/minim.c
index 2a7c5c689..2405dcf4b 100644
--- a/cde/programs/dthelp/parser/pass1/parser/minim.c
+++ b/cde/programs/dthelp/parser/pass1/parser/minim.c
@@ -31,9 +31,6 @@ This product and information is proprietary of Tandem Computers Incorporated.
 
 #include <stdio.h>
 #include <string.h>
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include "basic.h"
 #include "trie.h"
 #include "dtdext.h"
diff --git a/cde/programs/dthelp/parser/pass1/parser/param.c b/cde/programs/dthelp/parser/pass1/parser/param.c
index 579c6e4bf..be6a493d5 100644
--- a/cde/programs/dthelp/parser/pass1/parser/param.c
+++ b/cde/programs/dthelp/parser/pass1/parser/param.c
@@ -32,9 +32,6 @@ This product and information is proprietary of Tandem Computers Incorporated.
 #include <string.h>
 #include <stdio.h>
 #include <stdlib.h>
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include "basic.h"
 #include "trie.h"
 #include "delim.h"
diff --git a/cde/programs/dthelp/parser/pass1/parser/parutil.c b/cde/programs/dthelp/parser/pass1/parser/parutil.c
index 48e65b68e..d388d0837 100644
--- a/cde/programs/dthelp/parser/pass1/parser/parutil.c
+++ b/cde/programs/dthelp/parser/pass1/parser/parutil.c
@@ -33,9 +33,6 @@ This product and information is proprietary of Tandem Computers Incorporated.
 #include <stdio.h>
 #include <stdlib.h>
 #include <locale.h>
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include "basic.h"
 #include "trie.h"
 #include "dtdext.h"
diff --git a/cde/programs/dthelp/parser/pass1/parser/scan.c b/cde/programs/dthelp/parser/pass1/parser/scan.c
index e289b3808..0e9c8fe13 100644
--- a/cde/programs/dthelp/parser/pass1/parser/scan.c
+++ b/cde/programs/dthelp/parser/pass1/parser/scan.c
@@ -32,9 +32,6 @@ This product and information is proprietary of Tandem Computers Incorporated.
 #include <string.h>
 #include <stdlib.h>
 #include <stdio.h>
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include "basic.h"
 #include "trie.h"
 #define M_CONDEF
diff --git a/cde/programs/dthelp/parser/pass1/parser/struct.c b/cde/programs/dthelp/parser/pass1/parser/struct.c
index bff0065f2..c261567c4 100644
--- a/cde/programs/dthelp/parser/pass1/parser/struct.c
+++ b/cde/programs/dthelp/parser/pass1/parser/struct.c
@@ -33,9 +33,6 @@ This product and information is proprietary of Tandem Computers Incorporated.
 #include <string.h>
 #include <stdio.h>
 #include <stdlib.h>
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include "basic.h"
 #include "trie.h"
 #include "dtdext.h"
diff --git a/cde/programs/dthelp/parser/pass1/util/context.c b/cde/programs/dthelp/parser/pass1/util/context.c
index 39370a370..3d13a5025 100644
--- a/cde/programs/dthelp/parser/pass1/util/context.c
+++ b/cde/programs/dthelp/parser/pass1/util/context.c
@@ -158,9 +158,6 @@ delim.h.
 #include <stdlib.h>
 #include <stdio.h>
 #include <stdlib.h>
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include "basic.h"
 #include "trie.h"
 
diff --git a/cde/programs/dthelp/parser/pass1/util/conutil.c b/cde/programs/dthelp/parser/pass1/util/conutil.c
index b9694a2af..d83aa0a88 100644
--- a/cde/programs/dthelp/parser/pass1/util/conutil.c
+++ b/cde/programs/dthelp/parser/pass1/util/conutil.c
@@ -31,9 +31,6 @@ This product and information is proprietary of Tandem Computers Incorporated.
 #include <stdio.h>
 #include <string.h>
 #include <stdlib.h>
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include "basic.h"
 #include "trie.h"
 
diff --git a/cde/programs/dthelp/parser/pass1/util/emptyfil.c b/cde/programs/dthelp/parser/pass1/util/emptyfil.c
index 1efb397a7..5569cbe30 100644
--- a/cde/programs/dthelp/parser/pass1/util/emptyfil.c
+++ b/cde/programs/dthelp/parser/pass1/util/emptyfil.c
@@ -24,12 +24,9 @@
 /* Copyright (c) 1988, 1989 Hewlett-Packard Co. */
 /* Creates a file with nothing in it */
 #include <stdio.h>
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include "basic.h"
 
-void main(int argc, char **argv)
+int main(int argc, char **argv)
   {
     if (argc != 2) {
       fprintf(stderr, "Usage: emptyfil filename\n") ;
diff --git a/cde/programs/dthelp/parser/pass1/util/exit.c b/cde/programs/dthelp/parser/pass1/util/exit.c
index 04506ec5a..541a6590b 100644
--- a/cde/programs/dthelp/parser/pass1/util/exit.c
+++ b/cde/programs/dthelp/parser/pass1/util/exit.c
@@ -25,9 +25,6 @@
 Copyright 1988, 1989 Hewlett-Packard Co.
 */
 
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include "basic.h"
 
 void m_exit(int status);
diff --git a/cde/programs/dthelp/parser/pass1/util/fclndir.c b/cde/programs/dthelp/parser/pass1/util/fclndir.c
index 58d2c8498..e7c0005e8 100644
--- a/cde/programs/dthelp/parser/pass1/util/fclndir.c
+++ b/cde/programs/dthelp/parser/pass1/util/fclndir.c
@@ -37,9 +37,6 @@ with an error code of 0 if the files are the same, 1 if they differ, and
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include "basic.h"
 #define SAME 0
 /* different defined to be 0 as of 12-1-89, because fclndir now does
@@ -124,11 +121,7 @@ void copyfile(pfile1,pfile2)
    spaces, and the terminating null */
 	slen = strlen(pfile1) + strlen(pfile2) + 8;
 	pcmd = (char *) malloc(slen);
-#if defined(MSDOS)
-	ret = snprintf(pcmd, slen, "copy %s %s",pfile1,pfile2);
-#else
 	ret = snprintf(pcmd, slen, "cp %s %s",pfile1,pfile2);
-#endif
 	ret = system(pcmd);
 	ret = snprintf(pcmd, slen, "touch %s",pfile2);
 	ret = system(pcmd);
diff --git a/cde/programs/dthelp/parser/pass1/util/inctest.c b/cde/programs/dthelp/parser/pass1/util/inctest.c
index ee462a27d..ac45e68be 100644
--- a/cde/programs/dthelp/parser/pass1/util/inctest.c
+++ b/cde/programs/dthelp/parser/pass1/util/inctest.c
@@ -25,9 +25,6 @@
                    Copyright 1986, 1987, 1988, 1989 Hewlett-Packard Co.
 */
 
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include "basic.h"
 
 void m_err1(const char *text, const char *arg);
diff --git a/cde/programs/dthelp/parser/pass1/util/malloc.c b/cde/programs/dthelp/parser/pass1/util/malloc.c
index 111e9a865..1d036af2a 100644
--- a/cde/programs/dthelp/parser/pass1/util/malloc.c
+++ b/cde/programs/dthelp/parser/pass1/util/malloc.c
@@ -28,9 +28,6 @@
 /**/
 #include <stdlib.h>
 #include <stdio.h>
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include "basic.h"
 
 extern LOGICAL m_heapchk ;
@@ -58,9 +55,6 @@ void m_free(block, msg)
   {
     char buffer[32] ;
 
-#if defined(MSDOS)
-    if (m_heapchk) m_heapdump() ;
-#endif
     if (m_malftrace) {
 #if defined(hpux) || defined(_AIX) || defined(sun)
       snprintf(buffer, 32, "%5x:%5x",
@@ -75,46 +69,8 @@ void m_free(block, msg)
       m_trace("\n") ;
       }      
     free(block) ;
-#if defined(MSDOS)
-    if (m_heapchk) m_heapdump() ;
-#endif
     }
 
-#if defined(MSDOS)
-void m_heapdump(void)
-  {
-    struct _heapinfo hinfo ;
-    int heapstatus ;
-
-    heapstatus = _heapchk() ;
-    if (heapstatus == _HEAPOK || heapstatus == _HEAPEMPTY) return ;
-    printf("\nDumping heap:\n") ;
-    hinfo._pentry = NULL ;
-    while ((heapstatus = _heapwalk(&hinfo)) == _HEAPOK) 
-      printf("%6s block at %p of size %4.4X\n",
-             hinfo._useflag == _USEDENTRY ? "USED" : "FREE",
-             hinfo._pentry, hinfo._size) ;
-    switch(heapstatus) {
-      case _HEAPEMPTY:
-        printf("OK - empty heap\n\n") ;
-        break ;
-      case _HEAPEND:
-        printf("OK - end of heap\n\n") ;
-        break ;
-      case _HEAPBADPTR:
-        printf("Error - bad pointer to heap\n\n") ;
-        break ;
-      case _HEAPBADBEGIN:
-        printf("Error - bad start of heap\n\n") ;
-        break ;
-      case _HEAPBADNODE:
-        printf("Error - bad node in heap\n\n") ;
-        break ;
-      }
-    m_exit(TRUE) ;
-    }
-#endif
-
 void *m_malloc(size, msg)
   int size ;
   char *msg ;
@@ -123,14 +79,8 @@ void *m_malloc(size, msg)
     void *p ;
 
     size *= sizeof(M_WCHAR);
-#if defined(MSDOS)
-    if (m_heapchk) m_heapdump() ;
-#endif
     if (! size) return(NULL) ;
     p = (void *) malloc(size) ;
-#if defined(MSDOS)
-    if (m_heapchk) m_heapdump() ;
-#endif
     if (! p) {
       m_errline("Unable to allocate space for ") ;
       m_errline(msg) ;
@@ -164,14 +114,8 @@ void *m_realloc(ptr, size, msg)
     void *p ;
 
     size *= sizeof(M_WCHAR);
-#if defined(MSDOS)
-    if (m_heapchk) m_heapdump() ;
-#endif
     if (! size) return(NULL) ;
     p = (void *) realloc(ptr, size) ;
-#if defined(MSDOS)
-    if (m_heapchk) m_heapdump() ;
-#endif
     if (! p) {
       m_errline("Unable to re-allocate space for ") ;
       m_errline(msg) ;
diff --git a/cde/programs/dthelp/parser/pass1/util/openchk.c b/cde/programs/dthelp/parser/pass1/util/openchk.c
index 4020434c4..ecf3ab402 100644
--- a/cde/programs/dthelp/parser/pass1/util/openchk.c
+++ b/cde/programs/dthelp/parser/pass1/util/openchk.c
@@ -26,9 +26,6 @@
 */
 
 #include <stdio.h>
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include "basic.h"
 
 extern FILE *m_errfile ;
diff --git a/cde/programs/dthelp/parser/pass1/util/trie.c b/cde/programs/dthelp/parser/pass1/util/trie.c
index 500647ed8..81300d5be 100644
--- a/cde/programs/dthelp/parser/pass1/util/trie.c
+++ b/cde/programs/dthelp/parser/pass1/util/trie.c
@@ -31,10 +31,6 @@
 
 #include <stdio.h>
 
-#if defined(MSDOS)
-#include <stdlib.h>
-#endif
-
 #include "basic.h"
 #include "common.h"
 #include "trie.h"
diff --git a/cde/programs/dthelp/parser/pass2/build/build.c b/cde/programs/dthelp/parser/pass2/build/build.c
index 51ea7d7ce..a44fb2975 100644
--- a/cde/programs/dthelp/parser/pass2/build/build.c
+++ b/cde/programs/dthelp/parser/pass2/build/build.c
@@ -31,9 +31,6 @@ This product and information is proprietary of Tandem Computers Incorporated.
 
 #include <string.h>
 #include <stdlib.h>
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include "context.h"
 #define BUILDEF
 #include "build.h"
diff --git a/cde/programs/dthelp/parser/pass2/build/out.c b/cde/programs/dthelp/parser/pass2/build/out.c
index db2291a10..a051387f3 100644
--- a/cde/programs/dthelp/parser/pass2/build/out.c
+++ b/cde/programs/dthelp/parser/pass2/build/out.c
@@ -32,9 +32,6 @@ This product and information is proprietary of Tandem Computers Incorporated.
 #include <string.h>
 #include <stdlib.h>
 #include <ctype.h>
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include "context.h"
 #include "build.h"
 #include "delim.h"
diff --git a/cde/programs/dthelp/parser/pass2/build/scan.c b/cde/programs/dthelp/parser/pass2/build/scan.c
index 6412c9bf6..c6838ebb1 100644
--- a/cde/programs/dthelp/parser/pass2/build/scan.c
+++ b/cde/programs/dthelp/parser/pass2/build/scan.c
@@ -30,9 +30,6 @@ This product and information is proprietary of Tandem Computers Incorporated.
 /* Scan.c contains scanner procedures for program BUILD */
 
 #include <string.h>
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include "build.h"
 #define M_CONDEF
 #include "context.h"
diff --git a/cde/programs/dthelp/parser/pass2/eltdef/eltdef.c b/cde/programs/dthelp/parser/pass2/eltdef/eltdef.c
index f1858e140..f59e58012 100644
--- a/cde/programs/dthelp/parser/pass2/eltdef/eltdef.c
+++ b/cde/programs/dthelp/parser/pass2/eltdef/eltdef.c
@@ -32,9 +32,6 @@ This product and information is proprietary of Tandem Computers Incorporated.
 #include <stdio.h>
 #include <string.h>
 #include <stdlib.h>
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include "basic.h"
 #include "trie.h"
 
diff --git a/cde/programs/dthelp/parser/pass2/eltdef/eltutil.c b/cde/programs/dthelp/parser/pass2/eltdef/eltutil.c
index acfd50d79..3a63e5c73 100644
--- a/cde/programs/dthelp/parser/pass2/eltdef/eltutil.c
+++ b/cde/programs/dthelp/parser/pass2/eltdef/eltutil.c
@@ -32,9 +32,6 @@ This product and information is proprietary of Tandem Computers Incorporated.
 #include <stdio.h>
 #include <string.h>
 #include <stdlib.h>
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include "basic.h"
 #include "trie.h"
 
diff --git a/cde/programs/dthelp/parser/pass2/eltdef/scan.c b/cde/programs/dthelp/parser/pass2/eltdef/scan.c
index 3c4d91984..a32a268a1 100644
--- a/cde/programs/dthelp/parser/pass2/eltdef/scan.c
+++ b/cde/programs/dthelp/parser/pass2/eltdef/scan.c
@@ -31,9 +31,6 @@ This product and information is proprietary of Tandem Computers Incorporated.
 
 #include <stdio.h>
 #include <string.h>
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include "basic.h"
 #include "trie.h"
 
diff --git a/cde/programs/dthelp/parser/pass2/htag2/custom.c b/cde/programs/dthelp/parser/pass2/htag2/custom.c
index 7869d97ac..68ff59661 100644
--- a/cde/programs/dthelp/parser/pass2/htag2/custom.c
+++ b/cde/programs/dthelp/parser/pass2/htag2/custom.c
@@ -32,15 +32,6 @@ Copyright (c) 1988, 1989 Hewlett-Packard Co.
 #include "globdec.h"
 #include <stdlib.h>
 
-
-#if defined(MSDOS)
-/* Standard startup code doesn't have room to load inherited environments
-   in some cases.  Since they're not used, don't bother.  (Using Microsoft
-   C compiler).  */
-void _setenvp(void);
-void _setenvp(){}
-#endif
-
 /* Write input file and line number for an error message */
 void m_dumpline(file, line)
 M_WCHAR *file;
@@ -90,9 +81,6 @@ for ( ; *p ; p++)
     }
 }
 
-#if defined(MSDOS)
-#include <process.h>
-#endif
 /* Write error message suffix */
 void m_esuffix(void)
 {
diff --git a/cde/programs/dthelp/parser/pass2/htag2/global.h b/cde/programs/dthelp/parser/pass2/htag2/global.h
index 8630de937..e983ad9b3 100644
--- a/cde/programs/dthelp/parser/pass2/htag2/global.h
+++ b/cde/programs/dthelp/parser/pass2/htag2/global.h
@@ -36,11 +36,6 @@
 #include <stdlib.h>
 #include <string.h>
 #include <time.h>
-#if defined(MSDOS)
-#include <io.h>
-#include <process.h>
-#include <direct.h>
-#endif
 #include <ctype.h>
 
 #if defined(hpux) || defined(_AIX) || defined(sun) || defined(__linux__) || defined(CSRG_BASED)
diff --git a/cde/programs/dthelp/parser/pass2/parser/actutil.c b/cde/programs/dthelp/parser/pass2/parser/actutil.c
index 84d44c16f..59e084ead 100644
--- a/cde/programs/dthelp/parser/pass2/parser/actutil.c
+++ b/cde/programs/dthelp/parser/pass2/parser/actutil.c
@@ -32,9 +32,6 @@ in the interface definition.*/
 
 #include <stdio.h>
 #include <stdlib.h>
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include <string.h>
 #include "basic.h"
 #include "trie.h"
diff --git a/cde/programs/dthelp/parser/pass2/parser/entity.c b/cde/programs/dthelp/parser/pass2/parser/entity.c
index 8ff69c507..703f39fff 100644
--- a/cde/programs/dthelp/parser/pass2/parser/entity.c
+++ b/cde/programs/dthelp/parser/pass2/parser/entity.c
@@ -32,9 +32,6 @@ This product and information is proprietary of Tandem Computers Incorporated.
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include "basic.h"
 #include "trie.h"
 #include "context.h"
diff --git a/cde/programs/dthelp/parser/pass2/parser/error.c b/cde/programs/dthelp/parser/pass2/parser/error.c
index 3331b829b..7f6b9ab51 100644
--- a/cde/programs/dthelp/parser/pass2/parser/error.c
+++ b/cde/programs/dthelp/parser/pass2/parser/error.c
@@ -32,9 +32,6 @@ This product and information is proprietary of Tandem Computers Incorporated.
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include "basic.h"
 #include "trie.h"
 #include "dtdext.h"
diff --git a/cde/programs/dthelp/parser/pass2/parser/esuffix.c b/cde/programs/dthelp/parser/pass2/parser/esuffix.c
index 98e245b86..9b71a516e 100644
--- a/cde/programs/dthelp/parser/pass2/parser/esuffix.c
+++ b/cde/programs/dthelp/parser/pass2/parser/esuffix.c
@@ -27,9 +27,6 @@ Copyright 1988, 1989 Hewlett-Packard Co.
 
 #include "userinc.h"
 #include "globdec.h"
-#if defined(MSDOS)
-#include <process.h>
-#endif
 
 /* Write error message suffix */
 void m_esuffix(void)
diff --git a/cde/programs/dthelp/parser/pass2/parser/exit.c b/cde/programs/dthelp/parser/pass2/parser/exit.c
index 532097e0a..215dc6d98 100644
--- a/cde/programs/dthelp/parser/pass2/parser/exit.c
+++ b/cde/programs/dthelp/parser/pass2/parser/exit.c
@@ -27,9 +27,6 @@ Copyright 1988, 1989 Hewlett-Packard Co.
 
 #include "userinc.h"
 #include "globdec.h"
-#if defined(MSDOS)
-#include <process.h>
-#endif
 
 /* Default version of PARSER m_exit().  Allows interface control if
    internal error causes PARSER to halt. */
diff --git a/cde/programs/dthelp/parser/pass2/parser/minim.c b/cde/programs/dthelp/parser/pass2/parser/minim.c
index 9421a446d..2a7564db6 100644
--- a/cde/programs/dthelp/parser/pass2/parser/minim.c
+++ b/cde/programs/dthelp/parser/pass2/parser/minim.c
@@ -31,9 +31,6 @@ This product and information is proprietary of Tandem Computers Incorporated.
 
 #include <stdio.h>
 #include <string.h>
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include "basic.h"
 #include "trie.h"
 #include "dtdext.h"
diff --git a/cde/programs/dthelp/parser/pass2/parser/param.c b/cde/programs/dthelp/parser/pass2/parser/param.c
index 9f63e3f52..528c890dc 100644
--- a/cde/programs/dthelp/parser/pass2/parser/param.c
+++ b/cde/programs/dthelp/parser/pass2/parser/param.c
@@ -32,9 +32,6 @@ This product and information is proprietary of Tandem Computers Incorporated.
 #include <string.h>
 #include <stdio.h>
 #include <stdlib.h>
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include "basic.h"
 #include "trie.h"
 #include "delim.h"
diff --git a/cde/programs/dthelp/parser/pass2/parser/parutil.c b/cde/programs/dthelp/parser/pass2/parser/parutil.c
index d69d15813..499a91b3b 100644
--- a/cde/programs/dthelp/parser/pass2/parser/parutil.c
+++ b/cde/programs/dthelp/parser/pass2/parser/parutil.c
@@ -33,9 +33,6 @@ This product and information is proprietary of Tandem Computers Incorporated.
 #include <stdio.h>
 #include <stdlib.h>
 #include <locale.h>
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include "basic.h"
 #include "trie.h"
 #include "dtdext.h"
diff --git a/cde/programs/dthelp/parser/pass2/parser/scan.c b/cde/programs/dthelp/parser/pass2/parser/scan.c
index d42ac8f1c..309d0c51c 100644
--- a/cde/programs/dthelp/parser/pass2/parser/scan.c
+++ b/cde/programs/dthelp/parser/pass2/parser/scan.c
@@ -32,9 +32,6 @@ This product and information is proprietary of Tandem Computers Incorporated.
 #include <string.h>
 #include <stdlib.h>
 #include <stdio.h>
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include "basic.h"
 #include "trie.h"
 #define M_CONDEF
diff --git a/cde/programs/dthelp/parser/pass2/parser/struct.c b/cde/programs/dthelp/parser/pass2/parser/struct.c
index 164fa798e..a0cebd549 100644
--- a/cde/programs/dthelp/parser/pass2/parser/struct.c
+++ b/cde/programs/dthelp/parser/pass2/parser/struct.c
@@ -33,9 +33,6 @@ This product and information is proprietary of Tandem Computers Incorporated.
 #include <string.h>
 #include <stdio.h>
 #include <stdlib.h>
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include "basic.h"
 #include "trie.h"
 #include "dtdext.h"
diff --git a/cde/programs/dthelp/parser/pass2/util/context.c b/cde/programs/dthelp/parser/pass2/util/context.c
index c18345f79..080ff411c 100644
--- a/cde/programs/dthelp/parser/pass2/util/context.c
+++ b/cde/programs/dthelp/parser/pass2/util/context.c
@@ -157,9 +157,6 @@ delim.h.
 
 #include <stdio.h>
 #include <stdlib.h>
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include "basic.h"
 #include "trie.h"
 
diff --git a/cde/programs/dthelp/parser/pass2/util/conutil.c b/cde/programs/dthelp/parser/pass2/util/conutil.c
index d427156d3..8607f124b 100644
--- a/cde/programs/dthelp/parser/pass2/util/conutil.c
+++ b/cde/programs/dthelp/parser/pass2/util/conutil.c
@@ -31,9 +31,6 @@ This product and information is proprietary of Tandem Computers Incorporated.
 #include <stdio.h>
 #include <string.h>
 #include <stdlib.h>
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include "basic.h"
 #include "trie.h"
 
diff --git a/cde/programs/dthelp/parser/pass2/util/emptyfil.c b/cde/programs/dthelp/parser/pass2/util/emptyfil.c
index a9d94c046..a373d097f 100644
--- a/cde/programs/dthelp/parser/pass2/util/emptyfil.c
+++ b/cde/programs/dthelp/parser/pass2/util/emptyfil.c
@@ -24,9 +24,6 @@
 /* Copyright (c) 1988, 1989 Hewlett-Packard Co. */
 /* Creates a file with nothing in it */
 #include <stdio.h>
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include "basic.h"
 
 void main(int argc, char **argv);
diff --git a/cde/programs/dthelp/parser/pass2/util/exit.c b/cde/programs/dthelp/parser/pass2/util/exit.c
index 4389c94e8..ed0ca63eb 100644
--- a/cde/programs/dthelp/parser/pass2/util/exit.c
+++ b/cde/programs/dthelp/parser/pass2/util/exit.c
@@ -25,9 +25,6 @@
 Copyright 1988, 1989 Hewlett-Packard Co.
 */
 
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include "basic.h"
 
 void m_exit(int status);
diff --git a/cde/programs/dthelp/parser/pass2/util/fclndir.c b/cde/programs/dthelp/parser/pass2/util/fclndir.c
index c2abd295b..680608055 100644
--- a/cde/programs/dthelp/parser/pass2/util/fclndir.c
+++ b/cde/programs/dthelp/parser/pass2/util/fclndir.c
@@ -37,9 +37,6 @@ with an error code of 0 if the files are the same, 1 if they differ, and
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include "basic.h"
 #define SAME 0
 /* different defined to be 0 as of 12-1-89, because fclndir now does
@@ -124,11 +121,7 @@ void copyfile(pfile1,pfile2)
    spaces, and the terminating null */
 	slen = strlen(pfile1) + strlen(pfile2) + 8;
 	pcmd = (char *) malloc(slen);
-#if defined(MSDOS)
-	ret = snprintf(pcmd, slen, "copy %s %s",pfile1,pfile2);
-#else
 	ret = snprintf(pcmd, slen, "cp %s %s",pfile1,pfile2);
-#endif
 	ret = system(pcmd);
 	ret = snprintf(pcmd, slen, "touch %s",pfile2);
 	ret = system(pcmd);
diff --git a/cde/programs/dthelp/parser/pass2/util/inctest.c b/cde/programs/dthelp/parser/pass2/util/inctest.c
index ce3a58d1c..a9a393219 100644
--- a/cde/programs/dthelp/parser/pass2/util/inctest.c
+++ b/cde/programs/dthelp/parser/pass2/util/inctest.c
@@ -25,9 +25,6 @@
                    Copyright 1986, 1987, 1988, 1989 Hewlett-Packard Co.
 */
 
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include "basic.h"
 
 void m_err1(const char *text, const char *arg);
diff --git a/cde/programs/dthelp/parser/pass2/util/malloc.c b/cde/programs/dthelp/parser/pass2/util/malloc.c
index abed1c7ee..bead0dbdf 100644
--- a/cde/programs/dthelp/parser/pass2/util/malloc.c
+++ b/cde/programs/dthelp/parser/pass2/util/malloc.c
@@ -28,9 +28,6 @@
 /**/
 #include <stdlib.h>
 #include <stdio.h>
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include "basic.h"
 
 extern LOGICAL m_heapchk ;
@@ -56,9 +53,6 @@ void m_free(void *block, char *msg)
   {
     char buffer[32] ;
 
-#if defined(MSDOS)
-    if (m_heapchk) m_heapdump() ;
-#endif
     if (m_malftrace) {
 #if defined(hpux) || defined(_AIX) || defined(sun)
       snprintf(buffer, 32, "%5x:%5x",
@@ -73,46 +67,8 @@ void m_free(void *block, char *msg)
       m_trace("\n") ;
       }      
     free(block) ;
-#if defined(MSDOS)
-    if (m_heapchk) m_heapdump() ;
-#endif
     }
 
-#if defined(MSDOS)
-void m_heapdump(void)
-  {
-    struct _heapinfo hinfo ;
-    int heapstatus ;
-
-    heapstatus = _heapchk() ;
-    if (heapstatus == _HEAPOK || heapstatus == _HEAPEMPTY) return ;
-    printf("\nDumping heap:\n") ;
-    hinfo._pentry = NULL ;
-    while ((heapstatus = _heapwalk(&hinfo)) == _HEAPOK) 
-      printf("%6s block at %p of size %4.4X\n",
-             hinfo._useflag == _USEDENTRY ? "USED" : "FREE",
-             hinfo._pentry, hinfo._size) ;
-    switch(heapstatus) {
-      case _HEAPEMPTY:
-        printf("OK - empty heap\n\n") ;
-        break ;
-      case _HEAPEND:
-        printf("OK - end of heap\n\n") ;
-        break ;
-      case _HEAPBADPTR:
-        printf("Error - bad pointer to heap\n\n") ;
-        break ;
-      case _HEAPBADBEGIN:
-        printf("Error - bad start of heap\n\n") ;
-        break ;
-      case _HEAPBADNODE:
-        printf("Error - bad node in heap\n\n") ;
-        break ;
-      }
-    m_exit(TRUE) ;
-    }
-#endif
-
 void *m_malloc(size, msg)
   int size ;
   char *msg ;
@@ -121,14 +77,8 @@ void *m_malloc(size, msg)
     void *p ;
 
     size *= sizeof(M_WCHAR);
-#if defined(MSDOS)
-    if (m_heapchk) m_heapdump() ;
-#endif
     if (! size) return(NULL) ;
     p = (void *) malloc(size) ;
-#if defined(MSDOS)
-    if (m_heapchk) m_heapdump() ;
-#endif
     if (! p) {
       m_errline("Unable to allocate space for ") ;
       m_errline(msg) ;
@@ -162,14 +112,8 @@ void *m_realloc(ptr, size, msg)
     void *p ;
 
     size *= sizeof(M_WCHAR);
-#if defined(MSDOS)
-    if (m_heapchk) m_heapdump() ;
-#endif
     if (! size) return(NULL) ;
     p = (void *) realloc(ptr, size) ;
-#if defined(MSDOS)
-    if (m_heapchk) m_heapdump() ;
-#endif
     if (! p) {
       m_errline("Unable to re-allocate space for ") ;
       m_errline(msg) ;
diff --git a/cde/programs/dthelp/parser/pass2/util/openchk.c b/cde/programs/dthelp/parser/pass2/util/openchk.c
index 2bd2e681f..25445b13d 100644
--- a/cde/programs/dthelp/parser/pass2/util/openchk.c
+++ b/cde/programs/dthelp/parser/pass2/util/openchk.c
@@ -26,9 +26,6 @@
 */
 
 #include <stdio.h>
-#if defined(MSDOS)
-#include <process.h>
-#endif
 #include "basic.h"
 
 extern FILE *m_errfile ;
diff --git a/cde/programs/dthelp/parser/pass2/util/trie.c b/cde/programs/dthelp/parser/pass2/util/trie.c
index 945b1cee5..1476ed76f 100644
--- a/cde/programs/dthelp/parser/pass2/util/trie.c
+++ b/cde/programs/dthelp/parser/pass2/util/trie.c
@@ -31,10 +31,6 @@
 
 #include <stdio.h>
 
-#if defined(MSDOS)
-#include <stdlib.h>
-#endif
-
 #include "basic.h"
 #include "common.h"
 #include "trie.h"