 The Tube enabled processing to be farmed out to the second processor leaving the 6502 to perform data input/output (I/O).The Tube would later be instrumental in the development of Acorn's processor.In early 1980, the BBC Further Education department conceived the idea of a computer literacy programme, mostly as a follow-up to an ITV documentary, "The Mighty Micro", in which Dr Christopher Evans from the UK National Physical Laboratory predicted the coming microcomputer revolution.