"Puzzle Tanks" is a 1990 educational program developed by Thomas C. O'Brien and Jim Thomas, and distributed by WINGS for learning. This version is labeled "for Appleshare Network" and is distributed on a single non-bootable 3.5-inch (800K) disk. Despite the label, booting ProDOS from another local disk is sufficient to launch it. It requires an Apple IIgs, Apple //c+, Apple //e, or 64K Apple ][+ with a compatible drive controller card.