The Sol-20 computer by Processor Technology Corporation was a significant innovation on the path to the personal computer industry, being the first commercially mass produced, packaged small computer which had all the features of a modern PC, keyboard, video and an expandable architecture. Prior to the Sol, microcomputers came as home brew kits (or pre assembled) but did not come as a complete preassembled package including keyboard, case, and video output support, all from one manufacturer. Systems like the Altair 8800 and Apple I still required some assembly. Launched in late 1976, the Sol post-dated the earlier Sphere (which was produced in limited numbers) but predated the Apple II.
The Digibarn's Artifacts on Processor Technology and the Sol-20 Computer
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