Happy Birthday To You
"Twenty years ago, the first virus was born when Fred Cohen created one as an experiment. Today there are something in the region of 60,000 viruses and worms. Cohen created his virus when he was a doctoral student at the University of Southern California. Cohen's definition of a computer virus as "a program that can 'infect' other programs by modifying them to include a ... version of itself" is generally accepted as a standard."