The day he finished work on his first computer, Woz started working on an improved design, the future Apple II. The Apple II was based on the Apple I’s design, but in many ways it was a huge breakthrough.
First, it ran a lot faster with half as many chips. It also was the first computer that could produce color, with any color TV you would plug it into. It could handle high-resolution graphics and sound, and had a BASIC interpreter built-in. In short, it was the first computer that anybody who knew the BASIC programming language could use: it had what it took to launch the personal computing revolution.
The prototype for the Apple II was almost ready when Steve and Woz partook in the Personal Computer