diff --git a/DOS33.pm b/DOS33.pm
index 6ffd18b..ea45d29 100644
--- a/DOS33.pm
+++ b/DOS33.pm
@@ -1157,5 +1157,31 @@ $debug = 1;
   }
 }
 
+#
+# Undelete a file
+#
+sub undelete_file {
+  my ($dskfile, $filename, $dbg) = @_;
+
+  $debug = 1 if (defined $dbg && $dbg);
+
+  print "dskfile=$dskfile filename=$filename\n";
+
+  return 1;
+}
+
+#
+# Initialize a disk image.
+#
+sub init {
+  my ($dskfile, $volume, $dbg) = @_;
+
+  $debug = 1 if (defined $dbg && $dbg);
+
+  print "dskfile=$dskfile volume=$volume\n";
+
+  return 1;
+}
+
 1;
 
diff --git a/README b/README
index 711712b..fe48c46 100644
--- a/README
+++ b/README
@@ -4,10 +4,12 @@ catalog.pl -- mostly working
 freemap.pl -- mostly working
 dos33read.pl -- mostly working for simple text files
 dos33write.pl -- in progress
-dos33umlock.pl -- mostly working
+dos33unlock.pl -- mostly working
 dos33lock.pl -- mostly working
 dos33rename.pl -- mostly working
 dos33delete.pl -- in progress
 dos33copy.pl -- started
 zap.pl -- partially working
+dos33undelete.pl -- started
+dos33init.pl -- started
 
diff --git a/dos33init.pl b/dos33init.pl
new file mode 100644
index 0000000..012dfcc
--- /dev/null
+++ b/dos33init.pl
@@ -0,0 +1,39 @@
+#!/usr/bin/perl -w
+
+#
+# dos33init.pl:
+#
+# Utility to initialize an Apple II DOS 3.3 disk image.
+#
+# 20190310 LSH
+#
+
+use strict;
+
+use DOS33;
+
+my $debug = 0;
+my $volume = 254;
+
+while (defined $ARGV[0] && $ARGV[0] =~ /^-/) {
+  # Volume
+  if ($ARGV[0] eq '-v' && defined $ARGV[1] && $ARGV[1] =~ /^\d+$/) {
+    $volume = $ARGV[1];
+    shift;
+    shift;
+  # Debug
+  } elsif ($ARGV[0] eq '-d') {
+    $debug = 1;
+    shift;
+  } else {
+    die "Unknown command line argument $ARGV[0]\n";
+  }
+}
+
+my $dskfile = shift or die "Must supply .dsk filename\n";
+die "Volume must be 1-254\n" if $volume < 1 || $volume > 254;
+
+init($dskfile, $volume, $debug);
+
+1;
+
diff --git a/dos33undelete.pl b/dos33undelete.pl
new file mode 100644
index 0000000..09ca59a
--- /dev/null
+++ b/dos33undelete.pl
@@ -0,0 +1,33 @@
+#!/usr/bin/perl -w
+
+#
+# dos33undelete.pl:
+#
+# Utility to undelete a file on an Apple II DOS 3.3 disk image.
+#
+# 20190310 LSH
+#
+
+use strict;
+
+use DOS33;
+
+my $debug = 0;
+
+while (defined $ARGV[0] && $ARGV[0] =~ /^-/) {
+  # Debug
+  if ($ARGV[0] eq '-d') {
+    $debug = 1;
+    shift;
+  } else {
+    die "Unknown command line argument $ARGV[0]\n";
+  }
+}
+
+my $dskfile = shift or die "Must supply .dsk filename\n";
+my $filename = shift or die "Must supply filename (on disk image)\n";
+
+undelete_file($dskfile, $filename, $debug);
+
+1;
+