For mpm.
diff --git a/tmac/me/acm.me b/tmac/me/acm.me
new file mode 100644
index 0000000..1dde628
--- /dev/null
+++ b/tmac/me/acm.me
@@ -0,0 +1,55 @@
+.nr _0 \n(c.
+.\" @(#)acm.me 2.1 8/18/80
+.\" This version has had comments stripped; an unstripped version is available.
+.de ac
+.ll 8.9i
+.nr $s 0.5i
+.if !\\n($T \
+. po 1.0i
+.ie "\\$2"*" \
+\{\
+. nr hm 0.375i
+. nr tm 1.125i
+. pl 14.25i
+. nr bm 1.5i
+. de $h ..
+. tl ''%''
+...
+. rm $f
+.\}
+.el \
+\{\
+. nr hm 0
+. nr tm 0
+. pl 15i
+. nr bm 3i
+. nr fm 0.9i
+. de $f ..
+. ti 0
+\h'|0.5i'\\\\n%\h'|1.25i'\\$2\h'|3i'\\$1
+. br
+...
+. rm $h
+.\}
+.bp
+.rs
+.sp 0.75i
+.rm ac
+..
+.if t .tm Line \n(c. -- macro .ac will not work in TROFF -- request ignored.
+.if t .rm ac
+.de +c
+.if \\n(?A \
+\{\
+. nr ch 0 1
+. pn 1
+. ep
+. af % 1
+. bp
+.\}
+.nr ?A 0
+.sp 1i
+.if \\n(.$ \
+. $c "\\$1"
+..
+.nr c. \n(_0
