Philip Hazel is a computer programmer best known for writing the Exim mail transport agent[1][2] and the PCRE regular expression library.[3] He was employed by the University of Cambridge Computing Service until he retired at the end of September 2007. In 2009 Philip wrote an autobiographical memoir about his computing career.[4]
Philip Hazel is also known for his typesetting software, in particular "Philip's Music Writer",[5][6] as well as programs to turn a simple markup into a subset of DocBook XML for use in the Exim manual, and to produce PostScript from this XML.