Documentary chronicling the rise of the personal computer/home computer and software industry beginning in the 1970s with the Altair 8800, Apple I and Apple II and VisiCalc.

This episode covers Tim Paterson’s development of 86-DOS largely from duplicating Gary Kildall’s CP/M operating system. Microsoft purchased all rights to 86-DOS from Paterson’s employer SCP for $50,000 shortly before the release of the IBM PC. Microsoft’s resulting MS-DOS was an operating system that could run on any 8086-family computer.