The Free On-line Dictionary of Computing (30 December 2018):

Wilf Hey

    The person who originally developed Report Program
   Generator and coined the phrase GIGO (garbage in: garbage
   out).

   In 2004, after more than forty years in computing, he was
   writing for PC Plus magazine in the UK and doing Wilf's
   programmers workshop amongst other things.  He died on
   2007-01-01 after a long illness.

   (2007-01-06)