1. A computer virus capable of disrupting a computer program. 2. A self-contained program that can propagate itself through systems or networks. Note: Worms are often designed to use up available resources such as storage or processing time. 3. An independent program that replicates from machine to machine across network connections, often clogging networks and computer systems as it spreads. 4. Acronym for write once, read many (times. ) Note: A worm drive is used in recording data on a disk such that the data can then be read but not erased.