Computer Worm turns 20 today.
Very first computer worm originated on Nov 2 1988, when Robert Tappan Morris tried to estimate the size of the internet by an self-replicating application. It was designed to propagate across Unix systems and exploited vulnerabilities to gain entry. But unfortunately his program had a bug and far more progation attempts were made , than it was necessary, causing the targetted machine to slow down or shut down, as his application consumed lot of system resources.
Right now Robert Tappan Morris is a Professor at MIT and co-founder of Y-Combinator, a venture incubator that helps ignite promising startups.