A programming tutorial. No, really! My entry in the 1996 Interactive Fiction Contest. It came in 11th of 27 entries -- I regard that as pretty good for an entry which was not "fiction" at all.
Lists And Lists is copyright 1996 by Andrew Plotkin. It may be copied, distributed, and played freely.
Thanks for beta-testing and comments: Michael Kinyon, Dylan Thurston, Dave Seybert.