"Small, battery-powered "palm top" computer that runs the DOS operating system and has an RS-232 serial port and non-volatile SRAM cards for disk storage. These little computers are absolutely perfect for use out in the field with battery power (like during Field Day) and in portable operating events: contest logging, serial terminal for control of rigs, note-taking, data gathering, etc.
Powered by 2 "AA" bateries, the Poqet PC has a flip-up 80 char x 25 line LCD display and a pretty usable keyboard. The 1 megabyte removable PCMCIA SRAM cards can also plug into your full-blown laptop in order to transfer files between the computers, and the built-in software (editor, calculator, scheduler, address book and terminal emulator) allows you to use this 8088 XT-compatible computer for many purposes around the radio shack."
I have one for sale so if you're interesting in buying it - just let me know. Good condition, no mods, no warranty.