Alan Perlis Professions : Computer Scientist Born : April 1, 1922 Died : February 7, 1990 Browse All Authors Top 61 quotes by Alan Perlis LISP programmers know the value of everything and the cost of nothing. Alan Perlis value nothing everything know Similar Authors Bill Joy computer-scientist Butler Lampson computer-scientist Brian Reid computer-scientist Brian Kernighan computer-scientist Andrew S. Tanenbaum computer-scientist Andy Hertzfeld computer-scientist All Authors