Worm

1. First developed by John Shoch and Jon Hupp at Xerox PARC in 1978, a worm is a destructive software program containing code capable of gaining access to computers or networks, and once within the computer or network, causes that computer or network harm by deleting, modifying, distributing, or otherwise manipulating the data.

2. Short for Write Once Read Many, WORM is a type of CD that can be written to and then read from thereafter. See CD-R  for additional information.

Also see: Security definitions, Storage, Trojan Horse, Virus