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worm
Last modified: Friday, February 18, 2005 

(1) A program or algorithm that replicates itself over a computer network and usually performs malicious actions, such as using up the computer's resources and possibly shutting the system down. Also see virus.

Also see The Difference Between a Virus, Worm and Trojan Horse  in the Did You Know? section of Webopedia.

(2) When used in all capital letters, WORM is an acronym for for write once, read many, an optical disk technology that allows you to write data onto a disk just once. After that, the data is permanent and can be read any number of times.

Unlike CD-ROMs, there is no single standard for WORM disks, which means that they can only be read by the same type of drive that wrote them. This has hampered their acceptance, although they have found a niche market as an archival media.

WORM is also called CD-R.

Also see Understanding CD Burner Speeds in the Did You Know . . . ? section of Webopedia.

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A resource for daily information on e-security targeted to IT managers. The site provides users with information from a variety of sources, including experts at security product and services firms, and the consultants who follow the security industry.

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related categories

CD-ROMs

Ethics

Security

Viruses

related terms

antivirus program

ARPANET

bootable diskette

CD-ROM

COLD

Content Vectoring Protocol

data recovery

data vaulting

erasable optical disk

hacker

macro virus

mass storage

MBR

optical disk

phase change disk

pulsing zombie

Trojan horse

zombie


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