In 1982, a program called "Elk Cloner" was the first personal computer virus to appear "in the wild"—that is, outside the single computer or [computer] lab where it was created. Written in 1981 by Richard Skrenta , a ninth grader at Mount Lebanon High School near Pittsburgh , it attached itself to the Apple DOS 3.3 operating system and spread via floppy disk . 
A computer virus is a program that is able to copy itself when it is run. Often, computer viruses are run as a part of other programs. Any program that is affected by the virus is "infected". Biological viruses also work that way, as they copy themselves as part of other organisms.
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Stuxnet is a malicious computer worm, first uncovered in 2010, thought to have been in development since at least 2005.Stuxnet targets supervisory control and data acquisition systems and is believed to be responsible for causing substantial damage to the nuclear program of Iran.
Computer virus. Quite the same Wikipedia. Just better.
Brain is the industry standard name for a computer virus that was released in its first form in January 1986, and is considered to be the first computer virus for MS-DOS.It infects the boot sector of storage media formatted with the DOS File Allocation Table (FAT) file system.
The Melissa virus was a mass-mailing macro virus released on or around March 26, 1999. As it was not a standalone program, it was not classified as a worm. It targeted Microsoft Word and Outlook-based systems, and created considerable network traffic. The virus would infect computers via Email, the email being titled 'Important Message'. Upon ...
A virus is a small infectious agent that replicates only inside the living cells of an organism. Viruses can infect all types of life forms, from animals and plants to microorganisms, including bacteria and archaea. Since Dmitri Ivanovsky 's 1892 article describing a non-bacterial pathogen infecting tobacco plants, and the discovery of the ...
A virus is a physical embodiment of malicious software (or malware for short) that appends itself to a program file or a sector of a disk. Some viruses are merely annoying and can be removed with a few mouse clicks, while others can cause millions in damage and force computer owners to remove their operating systems and start all over again, or even require a new computer. While commonly ...
Dec 18, 2017 · A computer virus definition, Wikipedia-style. Looking for an essay-friendly definition? Here it goes: A computer virus is a program or piece of code designed to damage your computer by corrupting system files, wasting resources, destroying data or otherwise being a nuisance.
May 17, 2020 · A computer virus is one type of malware that inserts its virus code to multiply itself by altering the programs and applications. The computer gets infected through the replication of malicious code. Computer viruses come in different forms to infect the system in different ways.