A worm may refer to any of the following:
1. First developed by John Shoch and Jon Hupp at Xerox PARC (Palo Alto Research Center) in 1978, a worm is a destructive self-replicating program containing code capable of gaining access to computers or networks. Once in the computer or network, the worm causes harm by deleting, modifying, distributing, or otherwise manipulating data.
A worm may sometimes be called a worm virus.
Who created the first computer worm?
What's the difference between a worm and a virus?
Can a worm be destructive?
Yes. Like a virus, a worm can be designed to be destructive and may even be designed to look for a specific target.
2. Short for write once read many, WORM is a CD (compact disc) technology introduced by Philips and Sony in 1988. Using this technology, a CD is written to only once, but then may read multiple times. See CD-R (compact disc recordable) for additional information about this technology.