diff --git a/util/int/test/Makefile b/util/int/test/Makefile
new file mode 100644
index 000000000..fa6477d00
--- /dev/null
+++ b/util/int/test/Makefile
@@ -0,0 +1,28 @@
+# $Header$
+
+EM =		/usr/em#	# EM tree
+
+.SUFFIXES:	.em22 .em24 .em44
+
+.c.em22:
+	$(EM)/bin/em22 $*.c -o $*.em22
+
+.p.em22:
+	$(EM)/bin/em22 $*.p -o $*.em22
+
+.c.em24:
+	$(EM)/bin/em24 $*.c -o $*.em24
+
+.p.em24:
+	$(EM)/bin/em24 $*.p -o $*.em24
+
+.c.em44:
+	$(EM)/bin/em44 $*.c -o $*.em44
+
+.p.em44:
+	$(EM)/bin/em44 $*.p -o $*.em44
+
+clean:
+	rm -f e.out core mon.out int.mess int.log int.core int.tally \
+		*.k *.m *.o *.s *.em?? a.out
+
diff --git a/util/int/test/READ_ME b/util/int/test/READ_ME
new file mode 100644
index 000000000..3dbb6ff21
--- /dev/null
+++ b/util/int/test/READ_ME
@@ -0,0 +1,16 @@
+# $Header$
+
+Various small but non-trivial test programs that have been useful in
+testing and debugging the EM interpreter.
+
+E.out format files are identified by the suffices .em22, .em24 and .em44.
+The Makefile will produce these if called like:
+
+	make X.em24
+
+where X.[cp] is a C or Pascal program.  The Makefile has no facilities
+for multi-file programs.
+
+Awa.p is used by the Makefile in ../src, to do everyday testing; it must be
+present.
+
diff --git a/util/int/test/args.c b/util/int/test/args.c
new file mode 100644
index 000000000..82a6b32d0
--- /dev/null
+++ b/util/int/test/args.c
@@ -0,0 +1,32 @@
+/* $Header$ */
+
+/*
+	Test access to args and environ
+*/
+
+extern char **environ;
+
+main(argc, argv, envp)
+	char **argv, **envp;
+{
+	int i;
+
+	printf("# of args: %d\n", argc);
+
+	printf("\n");
+	for (i = 0; argv[i] != 0; i++)
+		printf("$%d=%s\n", i, argv[i]);
+
+	printf("\n");
+	for (i = 0; envp[i] != 0; i++)
+		printf("%s\n", envp[i]);
+
+	if (envp != environ)	{
+		printf("\n");
+		printf("different environment from `environ':\n");
+		for (i = 0; envp[i] != 0; i++)
+			printf("%s\n", envp[i]);
+		printf("\n");
+	}
+	exit(0);
+}
diff --git a/util/int/test/awa.p b/util/int/test/awa.p
new file mode 100644
index 000000000..ad011db94
--- /dev/null
+++ b/util/int/test/awa.p
@@ -0,0 +1,67 @@
+{ $Header$ }
+
+program ArrayWithoutArray(input, output);
+{	We simulate a (read-only) array by constructing a mapping
+	function   map(n)   which yields the n-th element.
+	We demonstrate its existence by first printing the length
+	of the array and then its contents.
+	This technique was first introduced by F.E.J. Kruseman-Aretz,
+	in the early sixties.
+}
+
+procedure Action(n: integer; function map(n: integer): integer);
+	{	Action is called when the construction of the virtual
+		array is finished.  Actually, all elements now reside
+		on the stack.
+		n:	the length of the array,
+		map:	the mapping function.
+	}
+	var i: integer;
+	begin	{ show that the whole array is still there }
+		writeln('#elems:', n);
+		write('elems:');
+		for i:= 1 to n do
+			write(map(i))
+	end {Action};
+
+procedure Construct(n: integer; function oldmap(n: integer): integer);
+	{	For each value read, Construct will store that value and
+		declare a new map function, composed of the old one
+		augmented by the new value.
+		It then calls itself recursively for the next value.
+		
+		n:	element number on this level
+		oldmap:	map for 1 .. n-1
+	}
+	var x: integer;		{ the value stored at level n }
+	
+	function newmap(i: integer): integer;
+		{ yields elements stored so far }
+		begin
+			if	{ the i-th element is kept on this level}
+				i = n
+			then	{ yield it }
+				newmap := x
+			else	{ try lower down the road }
+				newmap := oldmap(i)
+		end {newmap};
+	
+	begin
+		read(x);
+		if	{ it is a valid value }
+			x >= 0
+		then	{ we continue reading values and constructing maps }
+			Construct(n + 1, newmap)
+		else	{ we stop reading and pass the info on to Action }
+			Action(n - 1, newmap)
+	end {Construct};
+
+function EmptyMap(n: integer): integer;
+	begin
+		writeln('Illegal index', n, '; 0 yielded.');
+		EmptyMap := 0
+	end {EmptyMap};
+
+begin
+	Construct(1, EmptyMap)
+end.
diff --git a/util/int/test/fork2.c b/util/int/test/fork2.c
new file mode 100644
index 000000000..e9ec4b661
--- /dev/null
+++ b/util/int/test/fork2.c
@@ -0,0 +1,40 @@
+/* $Header$ */
+
+/*
+	Test forking
+*/
+
+#include <signal.h>
+
+main()
+{
+    int i, b;
+    long a;
+
+    i = fork();
+    if( i == 0 ) {
+	printf( "kind 1\n" );
+	i = fork();
+	if( i == 0 ) {
+	    printf( "kind 1.1\n" );
+	    exit( 111 );
+	} else {
+	    wait( &b );
+	    printf( "h:%d, l:%d\n", (b&0xFF00)>>8, b&0xFF);
+	    exit( 11 );
+	}
+    } else {
+	printf( "parent\n" );
+	i = fork();
+	if( i == 0 ) {
+	    printf( "kind 2\n" );
+	    exit( 22 );
+	} else {
+	    a = wait( &b );
+	    printf( "pid:%d, h:%d, l:%d\n", a, (b&0xFF00)>>8, b&0xFF);
+	    a = wait( &b );
+	    printf( "pid:%d, h:%d, l:%d\n", a, (b&0xFF00)>>8, b&0xFF);
+	    exit( 99 );
+	}
+    }
+}
diff --git a/util/int/test/ioc0.c b/util/int/test/ioc0.c
new file mode 100644
index 000000000..341cedb48
--- /dev/null
+++ b/util/int/test/ioc0.c
@@ -0,0 +1,36 @@
+/* $Header$ */
+
+/* Testing ioctl monitor call */
+#include	<sgtty.h>
+
+char sbuf[10];
+struct sgttyb old, ttyb;
+
+main()
+{
+   register i = 0;
+   char c;
+
+   if( ioctl( 1, TIOCGETP, &old ) != 0 ) {
+       write( 2, "ioctl ophalen mislukt\n", 22 );
+       exit( 100 );
+   }
+   write( 2, "Huidige status opgehaald\n", 25 );
+   ttyb = old;
+   ttyb.sg_flags &= ~ECHO;
+   if( ioctl( 1, TIOCSETP, &ttyb ) != 0 ) {
+       write( 2, "ioctl -echo mislukt\n", 20 );
+       exit( 100 );
+   }
+   write( 2, "Echo uitgezet\n", 14 );
+   write( 2, "geef input: ", 12 ); 
+   while( i<9 && (c = getchar()) != '\n' )
+       sbuf[i++] = c;
+   write( 1, sbuf, strlen(sbuf) );
+   if( ioctl( 1, TIOCSETP, &old ) != 0 ) {
+       write( 2, "ioctl reset mislukt\n", 20 );
+       exit( 100 );
+   }
+   write( 2, "Klaar\n", 6 );
+   exit( 0 );
+}
diff --git a/util/int/test/prtime.c b/util/int/test/prtime.c
new file mode 100644
index 000000000..0a1b1170f
--- /dev/null
+++ b/util/int/test/prtime.c
@@ -0,0 +1,39 @@
+/* $Header$ */
+
+/*
+	Test access to fields in struct stat
+*/
+
+#include	<sys/types.h>
+#include	<sys/stat.h>
+#include	<time.h>
+extern char * ctime();
+
+main(argc, argv) char *argv[];	{
+
+	while (argc > 1)	{
+		prfiltime(argv[1]);
+		if (argc > 2)
+			printf("\n");
+		argc--;
+		argv++;
+	}
+	exit(0);
+}
+
+prfiltime(name) char *name;	{
+	struct stat buf;
+
+	printf("%s: ", name);
+	if (stat(name, &buf) != 0)
+		printf(" not found\n");
+	else
+		prtime(&buf);
+}
+prtime(buf)
+	struct stat *buf;
+{
+	printf("%lu ", buf->st_mtime);
+	printf("%s\n", ctime(&buf->st_mtime));
+}
+
diff --git a/util/int/test/set.c b/util/int/test/set.c
new file mode 100644
index 000000000..be8322e5a
--- /dev/null
+++ b/util/int/test/set.c
@@ -0,0 +1,29 @@
+/* $Header$ */
+
+/*
+	Test combination of signal and setjmp/longjmp
+*/
+
+#include <setjmp.h>
+#include <signal.h>
+
+jmp_buf jb;
+void a(), b(); 
+
+main()
+{
+	char c;
+
+        signal( SIGINT, a );
+        signal( SIGQUIT, b );
+	switch( setjmp( jb ) ) {
+	    case 0: write( 1, "start\n", 6 ); break;
+	    case 1: write( 1, "int\n", 4 ); break;
+	    case 2: write( 1, "quit\n", 5 ); break;
+	}
+	while(read(0, &c, 1));
+	
+}
+
+void a(){ signal( SIGINT, a ); longjmp( jb, 1 ); }
+void b(){ signal( SIGQUIT, b ); longjmp( jb, 2 ); }
diff --git a/util/int/test/sig.c b/util/int/test/sig.c
new file mode 100644
index 000000000..32092b678
--- /dev/null
+++ b/util/int/test/sig.c
@@ -0,0 +1,27 @@
+/* $Header$ */
+
+#include <signal.h>
+
+/* testing signal(SIGINT, vang) */
+
+int handler();
+
+main()
+{
+	char *ch = "a\n";
+	
+	signal( SIGINT, handler );
+	while(1) {
+		write(1, ch, 2);
+		ch[0]++;
+		if (ch[0] > 'z')
+			ch[0] = 'a';
+	}
+}
+
+handler()
+{
+	/* vang CTRL-C op */
+	write( 1, "Heb um gevangen\n", 16 );
+	signal( SIGINT, handler );
+}