Retired IT professional who did his D Phil at Oxford. Saw the industry develop from next to nothing. Worked on first Capability based computer (a forerunner of the Intel 286), stored program control of public and private telephone exchanges, concept studies in 1980 for distributed office automation including proposals for distributed synchronous and asynchronous procedure calls, application of mathematical methods to computer systems, application of Object Oriented Design to software development in 1982, medical electronics (GE body scanners), crypto key management and computer security.