Apple II (1977 to 1993)
CPU class: MOS 6502
OS: Apple DOS, Apple Pascal, ProDOS
Development status: Open
Platform size: 7
When it came time to design a follow-up to the Apple I, Steve Wozniak drew on his love of video games to create the world’s least expensive color computer system. The Apple II retained the same 8-bit MOS 6502 CPU as its predecessor, but added a series of seven expansion slots that extended the lifespan of the platform. Oh, and it also included a case, a keyboard, and a power supply.
With seven major American variations on the Apple II platform, the Apple II became the center of an ecosystem populated by numerous first- and third-party software packages and accessories.