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.

Site is dedicated to the first home computer that could be bought in the UK.

International user group for old computer enthusiasts "old computers" and/or "old enthusiasts. Dedicated to preserving older and classic computer hardware, software, and literature.

This is a site devoted to the history of the PC, covers all types of personal computers from 1970 to present.

A mixture of science fiction and fact concerning the B205.

A physics professor tells about some of the early computers he worked with.

The Institute was established in 1997 to excavate, preserve, research, and present interesting and historically significant computing devices.

Information and links to computer history.

Documentation for the SWTPC computer line.

Dedicated to computers and/or operating systems which some might describe as obsolete.

Honoring personal computing in the 1980s.

The gathering of information concerning the primary stage of origination and development of IT and computing, primarily in Russia and ex-USSR.

Information about the late Soviet mainframe computer BESM-6, the last original was dismantled in 1995.

A personal tribute to an early model PC.

Shows all processes involved Building a replica of the German M4 Naval Enigma.

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.

Specifications and known problems of old hardware.

Rescues classic microcomputers and video games from the junk heap.

Trace out the brief of what led to the invention and developments of Digital computers.

A page with some pictures of Honeywell-Bull mainframes and mini's (DPS-6 and DPS-7)

Full details of a successful project to build a working reproduction of the 1964 prototype for the Block I Apollo Guidance Computer.

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.

History of 1802-based computing and home of the TinyELF emulator for Palm OS handhelds. Documents, scans, message board.

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 possible.

Thousands of scanned classic computer documents.