The story
Gates and Allen told the makers of the Altair they were developing BASIC for it before writing a line. They built it on an emulator in about two months, and it ran the first time they tried it on the real machine.

No. 005 · 1975 · Albuquerque
Sold software for a computer they'd never touched.
Software eats the PC
Make my startup a legendGates and Allen told the makers of the Altair they were developing BASIC for it before writing a line. They built it on an emulator in about two months, and it ran the first time they tried it on the real machine.