Radio Shack TRS80 Color Computer (the Coco)

From Sock Master's Tandy Color Computer 3 page:

The Tandy Color Computer 3 may well be the ultimate hobby computer. It's easy to program, easily interfaces with the real world (It has 4 analog inputs, 1 analog output, and numerous digital inputs and outputs built-in), and it's easy to create your own hardware.

See Also:

The DigiBarn's other Tandy/Radio Shack (TRS-80) computer systems

The TRS-80 Home Page's section on the Color Microcomputer (the Coco)

Sock Master's Tandy Color Computer 3 page

Oldcomputers.net's page on the Coco