signals and did not have to undergo FCC testing. One of Atari's major vendors, Sears, felt this was not a suitable solution for their off-the-shelf sales, so to meet the interference requirements they encased the entire system in a cast-aluminum block 2 mm thick.

Colleen was originally intended to be a game console, the successor to the Atari 2600. The success of the Apple II led to the system being repositioned as a home computer,