Apple's portable, 9-inch-screen computer was an exciting graphical leap, and I wanted to use it for everything. But I wasn't using it. Instead, I, like virtually every office worker in the world, was ...

Using an 8-bit 6502 microprocessor running at 1 MHz and an 8-bit bus, it ran the Apple DOS and ProDOS operating systems. AppleSoft BASIC was built in (in a ROM chip). With a Z80 microprocessor ...