Mechanical Aids to Calculation
- History on the first automatic totalizer by Sir George Julius, mechanical aids to calculation - extracts of a paper presented to the Institution of Engineers Australia in 1920.
- http://members.ozemail.com.au/~bconlon/calcaids.htm

Largest Classic Computer Documentation Archive
- Thousands of scanned classic computer documents.
- http://www.bitsavers.org/pdf/Index.txt

The Apollo Guidance Computer Project
- The Apollo Guidance Computer (AGC) was developed to provide reliable real-time control for the Apollo spacecraft that carried US astronauts to the moon, 1969-1972. This site is devoted to documenting the machines, people and institutions that made this
- http://hrst.mit.edu/hrs/apollo/public/

Cosmac Elf
- History of 1802-based computing and home of the TinyELF emulator for Palm OS handhelds. Documents, scans, message board.
- http://homepage.mac.com/ruske/cosmacelf/

ICL 1900 Series Computers
- Information about the ICL 1900 series mainframes from the 1970s, both hardware and software. The George (1S, 2, 3 & 4) series operating systems, Minimop and Maximop. Programming languages and other information.
- http://www.fcs.eu.com/icl1900/index.html

Ian's 'Naff Computer Pics Page'
- A page with some pictures of Honeywell-Bull mainframes and mini's (DPS-6 and DPS-7)
- http://web.ukonline.co.uk/ie.dunster/My%20Stuff/Computer_page.htm

The Computer Closet
- Rescues classic microcomputers and video games from the junk heap.
- http://www.computercloset.org/

Sos-hardware.windowstothemax.com
- Specifications and known problems of old hardware.
- http://sos-hardware.windowstothemax.com

Enigma Replica
- Shows all processes involved Building a replica of the German M4 Naval Enigma.
- http://www.enigma-replica.com

Video Genie System
- A personal tribute to an early model PC.
- http://home.online.no/~kr-lund/VGS.htm

BESM-6 Nostalgia Page
- Information about the late Soviet mainframe computer BESM-6, the last original was dismantled in 1995.
- http://www.mailcom.com/besm6/

Russian Virtual Computer Museum
- The gathering of information concerning the primary stage of origination and development of IT and computing, primarily in Russia and ex-USSR.
- http://www.computer-museum.ru/english/index.htm

Retro Computer Gallery
- Collection of pictures of old computers, consoles, handhelds and magazines.
- http://www.imarshall.karoo.net/

The Oldskool PC Shrines
- Honoring personal computing in the 1980s.
- http://www.oldskool.org/shrines/

John Elliott
- Dedicated to computers and/or operating systems which some might describe as obsolete.
- http://www.seasip.demon.co.uk/

The SWTPC Computer Documentation Repository
- Documentation for the SWTPC computer line.
- http://www.swtpc.com/

Blinkenlights Archaeological Institute
- The Institute was established in 1997 to excavate, preserve, research, and present interesting and historically significant computing devices.
- http://www.blinkenlights.com/

PC - History
- Devoted to the history of the PC, covers all types of personal computers from 1970 to present.
- http://www.pc-history.org/

Historical Computer Society
- International user group for old computer enthusiasts "old computers" and/or "old enthusiasts. Dedicated to preserving older and classic computer hardware, software, and literature.
- http://www.cyberstreet.com/hcs/hcs.htm

Charles Babbage Institute
- CBI is a research center dedicated to promoting the study of the history of computing and its impact on society, and preserving relevant documentation.
- http://www.cbi.umn.edu/

MIXTEL
- Site is dedicated to the first home computer that could be bought in the UK.
- http://www.mixtel.pwp.blueyonder.co.uk/

Computer History Association of California
- Chac is a nonprofit corporation, who safeguards and organizes the history of electronic computing, not only in California, but nationally and internationally. They collect and archive hardware, software and documents.
- http://www.chac.org/