Sinclair

Home Electronics Service
Service, hardware and software providers for Sinclair QL and Z88. Located in San Antonio, Texas, USA.
http://members.tripod.com/hes_computing/hes1.html

The Lil Old Sinclair Computer Technical Information Repository
Technical information concerning ZX Spectrum and ZX81, including instruction and service manuals, layouts and schematics.
http://members.lycos.co.uk/eightbitula/

Sinclair Nostalgia Products
Site provides snapshots, MIDI files, screen savers, counter digits and information about a lot of hard-to-find clones of the Sinclair machines, focusing particularly on those from Eastern Europe and Russia.
http://www.interface1.net/zx/

SinTech Online-Shop
Dealer in hardware and software for Sinclair Spectrum and other 8-bit computers. Also the support-line for the ZX Spectrum User Club, Germany.
http://www.sintech-shop.de