
Designed by Steve Wozniak and aimed at the consumer market, the Apple II debuted in 1977 at the West Coast Computer Faire. It became one of the first successful mass-produced microcomputers, featuring the ability to display color graphics and play sound.

Since the Apple II aimed at consumers rather than hobbyists, Apple designed the machine to function straight out of the box–quite an innovation for the time, when most computers were sold as kits to be assembled by the user. It featured a built-in keyboard, BASIC Programming, color graphics, seven expansion slots, and a direct connection for a television monitor.
The Apple II became popular in classrooms because its open architecture made it easy to create third-party software. It received many upgrades and continued in the market for 15 years. In fact, it became the first widespread computer in US schools.
Initially, the Apple II provided the Apple DOS operating system in ROM, and the only storage available was with a cassette tape.