Complex sentence: He founded Acorn Computers Ltd with Chris Curry and Andy Hopper in 1978 and, when that company was bought by Olivetti in 1985, he became vice-president for research at Olivetti where he was in charge of laboratories in the US and Europe.
Split into simpler sentences: He founded Acorn Computers Ltd with Chris Curry and Andy Hopper in 1978. When Olivetti took control of Acorn in 1985, he became vice-president for research at Olivetti where he was in charge of laboratories in the US and Europe.