Apple II microcomputer, 1977.
© Science Museum / Science & Society Picture Library
The Apple II was designed and built by Steve Jobs and Steve Wozniak by the end of 1976. It was the first mas-marketed personal computer. The Apple II was a single-board computer like the Apple I, but the Apple II was much improved, going several steps further than its predecesor. The Apple II had the BASIC (Beginner's All Symbolic Instruction Code) programming language built in, and it had the ability to display text and graphics in colour.