The MirBSD Korn Shell (mksh) is the enhanced version of the Public
Domain Korn shell (pdksh), a bourne-compatible shell which is largely
similar to the original AT&T Korn shell.

Documentation is available at:
http://www.mirbsd.org/MirOS/dist/mir/mksh/mksh.pdf

WWW: https://mirbsd.org/mksh