The Internet worm incident
Eugene Howard Spafford · Purdue e-Pubs (Purdue University System) · 1990
... This paper explains why this program was a worm (as opposed to a virus), and provides a brief chronology of both the spread and eradication of the program. That is followed by discussion of some specific issues raised by the community's reaction and subsequent discussion of the event. Included are some interesting lessons learned from the incident.