The Computer Museum of America http://www.computer-museum.org
San Diego museum whose mission is to preserve the major milestones in the development of the computer industry and to chronicle these milestones for the enrichment and education of all.
The Machine Room http://www.machine-room.org
Information on numerous old computers. Includes pictures, descriptions, technical details, trivia, links, and information for collectors.
The Obsolete Computer Museum http://www.eldocountry.com/
Visit my collection of personal computers from 1976 to the present. On display is Apple II, IIe, Apple III, Mac SE/30, Mac Classic II and TRS-80 to name a few. Also the homebrew EDCAM.