Analog Science Fiction - Science Fact May 1993 (Vol.113, No.6)
Cover by Jim Burns.

Novelettes: "Sunshine, Genius, and Rust" by Jeffrey D. Kooistra
"The Mislaid Mastodon" by L. Sprague de Camp ("Reginald Rivers" series)
"A Tear in the Mind's Eye" by Maya Kaathryn Bohnhoff
Science Fact: "Is AIDS an Autoimmune Disease?" by Dr. J. Kevin Steele

Stories: "Fool's Errand" by Sarah Zettel
"Some Choices" by Mark Rich
"White Room" by Stephen L. Burns.

Stanley Schmidt's editorial is "Test-Driving the Future."