Born on this day in 1930, he gave us ALGOL, the basis of all decent programming languages today, and the entire concept of structured programming. Ah, well I remember the ALGOLW compiler on the 360... There's a beaut article here: https://www.cs.utexas.edu/users/EWD/ewd02xx/EWD215.PDF And remember, testing can show the presence of errors, but not their absence... -- Dave Horsfall BSc DTM (VK2KFU) -- FuglySoft -- Gosford IT -- Unix/C/Perl (AbW) People who fail to / understand security / surely will suffer. (tks: RichardM)