The TRS-80 PC-4 was one of the low-end pocket PCs offered by Radio Shack in the early 1980s. It was fully programmable in BASIC but had limited memory and display capabilities.
The TRS-80 has a full-stroke QWERTY keyboard, a custom HD 61913 CMOS processor, and 1.9 KB DRAM standard memory. The computer itself could be attached to a docking station, which expanded the capabilities of the machine, adding a small printer, micro cassette, and additional RAM.
Manufactured in Japan, tens of thousands of these computers were sold all over the world.
(Photo: RadioShack)