http://www.bbc.co.uk/news/technology-17776666
SpeccyThe ZX Spectrum is 30 years old. The successor to Sir Clive Sinclair's ZX81 - at the time the world's best selling consumer computer - it introduced colour "high resolution" graphics and sound.
It also offered an extended version of Sinclair Basic, a computer language with which hundreds of thousands of users were already familiar.