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A computer worm is a computer program that makes lots of copies of itself, like a computer virus. The main difference between the two is that a computer virus attaches itself to another computer program, but a worm works by itself.
As well as copying itself, a worm can be made to do all sorts of things, like delete files on a computer, or send e-mails to everyone the owner has in their address book
Challenge see if you can find out one extra fact on this topic that we haven't already told you
Click on this link: Worm
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