Woz used it himself to write the first program to ever run on the machine, a game called Breakout. The eight expansion slots in Apple II made a difference, too. Woz decided to implement them against Steve Jobs’ will, and this proved a wise move, as they allowed for all kinds of new features and software to be added to the machine. One of those features was Disk II, a floppy disk drive Apple started shipping in early 1978. It made the sharing and installing of new software very easy — soon the supply of Apple II software was thriving.

But probably the most important push toward the

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