Clifford "Cliff" B. Jones FREng (born 1 June 1944) is a British computer scientist, specializing in research into formal methods. He undertook a late DPhil at the Oxford University Computing Laboratory (now the Oxford University Department of Computer Science) under Tony Hoare, awarded in 1981. Jones' thesis proposed an extension to Hoare logic for handling concurrent programs, rely/guarantee. As well as formal methods, Jones also has interests in interdisciplinary aspects of computer science and the history of computer science.