abc2abc(1) on Linux
The text 13bc842291b5, as Debian 8 (Jessie) shipped it.
a simple abc checker/re-formatter/transposer
Flags it lists
-
-OCC -
-b -
-d -
-e -
-nda -
-nokeyf -
-nokeys -
-r -
-s -
-u -
-usekey -
-v -
-ver