Poqet PC Model PQ-0164 (1990)

 Years before the Pocket PC, there was the Poqet PC. About the size of a videotape, the Poqet was pricey ($2000), but it ran off-the-shelf applications and could go for weeks on two AA batteries. Highly praised during its brief life, the Poqet vanished from the market after its manufacturer was acquired by Fujitsu. As with seemingly every interesting computer of yore, it still has its devotees, including Bryan Mason, proprietor of the informative Poqet PC Web Site.