1989: Poqet PC
The late 1980s were an era when businesses still talked about being IBM-compatible, so it was inevitable that some handheld pioneers would incorporate MS-DOS and run essential software like Lotus 1-2-3 and WordPerfect. The $2,000 Poqet PC did just that.
Packing a whopping 640K of RAM and expandable storage into a one-pound clamshell computer the size of a VHS tape, the Poqet PC was a subnotebook designed to be held in one hand and typed on with the other. It even packed communications features -- you could access dial-up online services with it through an RS232 port. And the Poqet PC did what most modern handhelds don't: started up instantly and lasted for 50 hours on a pair of AA batteries.