Sinclair ZX81 Keyboard

By Xah Lee. Date:
Sinclair ZX81 keyboard 1
Sinclair ZX81 keyboard. (image source)
Sinclair ZX81 keyboard 6
Sinclair ZX81 keyboard. (image source)
Sinclair ZX81 keyboard 7
Sinclair ZX81 keyboard. (image source)

Jurassic Tech: The Sinclair ZX81 By Todd Ogasawara. At http://anewdomain.net/2011/12/30/jurassic-tech-the-sinclair-zx81/

Sinclair's 1984 big shot at business: The QL is 30 years old: Quantum Leap micro leapt too early By Tony Smith. At http://www.theregister.co.uk/2014/01/12/archaeologic_sinclair_ql/

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