Acorn Atom

Acorn's first complete computer, sold as a kit or built, and the machine that got the company into the room for the BBC contract. A 6502 with Acorn's own BASIC in ROM, expandable to floating point and colour, in a wedge case with a real keyboard when rivals offered calculator keys. Most interesting as the direct ancestor of the Proton prototype that became the BBC Micro, and as evidence of how quickly Acorn moved between 1980 and 1981.