Retrocomputing

Apollo Domain OS
Offers an archive of information including patches and jumpers for users of this operating system.
http://apollo.maxnt.co.jp/apollo/english/

The AT&T Unix PC
AT&T 3B1/7300 Unix PC information archives.
http://unixpc.taronga.com

Eric Smith's Retrocomputing page
This is a veritable "home museum" covering the personal computer from the PDP-11 and the IBM 5100 onwards...
http://www.brouhaha.com/~eric/retrocomputing/

Erik S. Klein's Vintage Computer Collection
A virtual computer museum representing Erik Klein's personal collection of historical computers. The site features computer history, pictures and a message board.
http://www.vintage-computer.com

James the Animal Tamer's Emulators
Emulators for the Aquarius, the TRS-80 MC-10, the APF imagination machine, the NEC Trek (aka NEC PC-6001A) and the Panasonic JR-200U PC.
http://www.geocities.com/emucompboy/

Lee's Peek n Poke UK
Classic Video and Computer games.
http://peeknpoke.gazaxian.com/

Mattel Aquarius Homecomputer
All about the Mattel Electronics / Radofin computer with technical information and links.
http://www.vdsteenoven.com/aquarius/

Obsolyte - Obsolete and Elyte!
A website about the old workstations, focusing on unix systems. The only known archive of material.
http://www.obsolyte.com/

The Official IMSAI Website
Vendor of the original 8080-based microcomputer. They still sell parts and are releasing a more modern release, the IMSAI Series 2, compatible with CP/M and ZS-DOS.
http://www.imsai.net/

The Old Computer
Dedicated to all aspects of retro computing, old computers, games consoles, handhelds, games and watches.
http://www.theoldcomputer.com/

Old-Computers.com
Contains historical information as well as collector links.
http://www.old-computers.com

Oldcomputers.net
A historical timeline on computers dating back to 1970.
http://oldcomputers.net/

OldVersion.com
Non-profit organization serving the online community by providing old versions of various programs.
http://www.oldversion.com/

Pelikonepeijoonit.net
A Finnish collection of around 200 classic computers and game consoles, with information articles, links and even some fun.
http://www.pelikonepeijoonit.net

PERQ Workstations
All about PERQ workstations.
http://www.chiark.greenend.org.uk/~pmaydell/PERQ/

Retro Review
Retro computing magazine.
http://www.retroreview.com/

Retrocomputing Archive
Software for classic computer systems.
http://www.retroarchive.org/

Software for Honeywell 16 bit minicomputers.
Software for Honeywell Series 16 bit minicomputers. DDP-116 DDP-516 and H-316 / H316.
http://www.theoengel.nl

Thomson MO5, MO6 and Olivetti PC128
Downloadable games and programs with screenshots, cover art, and documentation.
http://mo5.free.fr/

Unicomp Keyboards
Manufacturers of IBM style buckling spring keyboards.
http://pckeyboards.stores.yahoo.net/

Vector Graphics Terminals
Information about storage tube vector graphics terminals, with examples from a private collection.
http://www.cca.org/vector/

Vintage Game Site
Information about vintage gaming and vintage computers from the first-ever home computers to the 1990s.
http://VintageGameSite.com

Visual Technology Visual 1050
Provides historical and technical information on the Visual Technology Visual 1050 computer.
http://bramante.metabarn.com/visual1050/

Yahoo! Groups: mattelaquarius
A place to discover, chat about and just get general information on the Mattel Aquarius home computer.
http://tech.groups.yahoo.com/group/mattelaquarius/