The documentary Triumph of the Nerds summarizes the early history of the personal computer, including the development of key machines like the MITS Altair 8800 and Apple I, the founding of Microsoft by Bill Gates and Paul Allen, and the launch of the IBM PC in 1981 which helped drive adoption of personal computers. It explores the roles of software developers like VisiCalc creator Dan Bricklin in creating early useful applications, and how Microsoft's MS-DOS became the dominant operating system over rival CP/M. The film examines the rise of Silicon Valley as the epicenter of technology innovation and the launch of Windows 95 as a milestone in usability.