I.C.T. bought Electrical Musical Industries (E.M.I.) Computer Division in 1962 and Ferranti Computer Department in 1963, and became International Computers Limited (I.C.L.) in 1968.

Strachey became a consultant in 1963, his contract being renewed periodically to May 1965 when he left for M.I.T. He resumed his consultancy in July 1966.