This document provides a high-level timeline of key events in the development of the Internet from the 1970s to the late 1990s. It begins with the introduction of early personal computers like the Altair 8800 and Apple II in 1975. Important developments include the launch of the IBM PC in 1981, the introduction of portable "luggable" computers in the 1980s, and the debut of the Macintosh in 1984. The timeline also notes early work using computer networks for social networking and distance education in the 1980s. Key projects in the late 1980s and 1990s include developing online executive training and graduate business programs.