CRC stands for Cyclic Redundancy Check

CRC stands for Cyclic Redundancy Check. It is a hash function that detects accidental changes to raw computer data. These changes can result from transmission errors or physical damage, such as scratches on a hard drive platter or magnetic tape.

CRC is used in both digital communications and storage devices to guard against data corruption. In these applications, the sender calculates a CRC code based on the original message or file that they’re sending; then when the receiver gets their copy of the message/file, they check its CRC against what was sent by comparing their received CRC with their calculated one. If there are any discrepancies between the two values (either they don’t match up at all or one of them contains an error), then something has gone wrong somewhere along its path through space-time: either during transmission over a network connection between sender and receiver or while copying your DVD onto your laptop’s hard drive using CD/DVD recording software like Roxio Creator NXT Pro 9!

Early versions of parity check code were used to detect errors in data transmissions. In this technique, the data is sent over a communications channel in blocks. Each block includes an extra bit known as the parity bit. At the destination end, these bits are combined with a majority vote rule to determine if any one of them has been flipped by noise or interference on the transmission line. If this occurs, it can be detected because there will be an odd number of votes for 1 and an even number of votes for 0 (which means that there must have been at least one error).

The simple but effective technique was used in early computers such as ENIAC (Electronic Numerical Integrator And Computer) which was built at the University of Pennsylvania during World War II and came online in 1946; it was also used later on mainframes from IBM Corporation such as System/360 (1964), System/370 (1970), etc., Digital Equipment Corporation’s PDP-11 minicomputer which first hit stores around 1970; Apple Inc.’s Macintosh personal computer introduced about 1984; as well as other systems that followed these models

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