Designed by Steve Wozniak, the Apple II was one of the first home computers sold ready to use, in a beige plastic case with a built-in keyboard and colour graphics. Its lid lifted off to show eight expansion slots.
With its Disk II floppy drive and the spreadsheet VisiCalc, it found its way into homes, schools and offices, and versions of it stayed on sale until 1993.
Wozniak built its colour from a trick of the television signal. In high resolution there were six colours: black, white, green, violet, orange and blue. Which colours a pixel could be depended on whether it sat in an odd or even column and on a colour group set for every seven pixels, so colours fringed where they met. There was also a blocky 40x48 mode with 16 colours.
A speaker the processor clicked on and off, as on the Spectrum: one note at a time, and the game waited while it played.