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Computer Science Operating System

Computer Science Operating System

A virus is a small pc program designed to do harm by destroying information, changing info, or sabotaging whole computer networks. The computer virus originally was a concept of science fiction. The concept from John Brunner's science fiction book was a worm, the computer equivalent of a parasitic tapeworm, producing new sections because of itself in all machines of a community and for that reason unstoppable. Though this type of application was beyond the capacity of developers at that time. The figurative use of the term virus relies on the virus that multiples itself inside an organism. So too a pc virus has got the same capability to replicate itself from a computer system.

A virus spreads by burying itself deep in the computer's disc OS. The DOS is a set of directions coordinating the activities of the disc drive, the computer keyboard, the screen, and the CPU this performs the arithmetic and logic operations. The DOS must run each time the computer is turned on. Viruses have a propensity to creep past several users of computers since the viruses, such as legitimate applications, are written in a pc programming language, a kind of code composed of letters, numbers in addition to another computer keyboard. A programming code provides instructions to the pc Behind the screen so that most users are never aware that their system was breached.

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Along with infected legitimate applications or the illegal copy of software sold on discs, viruses are transmitted throughout the world wide web. Once a virus has been discovered it's simple to write a simple program to eliminate the virus. Creators of such viruses can just as easily update their viruses to override such an application. Some viruses can change even the characters in their code each time they reproduce, making it nearly impossible to stop them. The first real virus was the theme of a pc science experiment in Nov 1983, presented by Fred Cohen, a professor of pc science at even the University of Cincinnati in Ohio, to a seminar on pc security.

He developed the first pc virus as part of his research on pc security for his doctorate thesis. When Cohen introduced the idea to even the seminar, even the name virus was apparently suggested by Len Adleman. According to Cohen, pc viruses are so easy to write this Anybody can do it. He said this was possible from some programming languages to write a virus from as few as 11 characters. By the second 50% of even the eighties, even the virus had become a serious and prolific hazard to individual and corporate pc users, since even the code copies itself into even the computer's memory and after that causes havoc, it is advisable to avoid using floppy disks that might conceivably contain a virus freeware and disks supplied by clubs, for instance.

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