An active German Sinclair ZX81 users' group. Site offers information about the Sinclair machines and the group's activities, including news of forthcoming events, in English and German.

Information, photos and resources for the Sinclair ZX80, including a detailed account of its development extracted from Ian Adamson and Richard Kennedy's book "Sinclair and the Sunrise Technology".

Pictures, newsletters and programs made with the ZX81, a 16kb rampack and a Timex 2040 printer. Updated monthly.

Timex-Sinclair ZX81 computer kits for sale.

A ZX81 FAQ, emulator and software links.

How to build your own ZX80 and ZX81.

Technical specifications and pictures of the Sinclair ZX81 with comments from other ZX81 owners.

A ZX81 software archive.

Some common questions about the ZX81.

Article from Personal Computer World by David Tebbutt.