For Parity checking we have terms and definitions in 2 topics. The topics are Computer Virus and SCSI.

Parity Checking (Computer Virus)

The process of verifying the integrity of data transferred between computers, usually over a modem or null modem cable. The most common methods are even parity checking and odd parity checking. Depending on the parity checking method used, an extra bit, called a parity bit, is added to each group of bits to make the number of transmitted bytes either even or odd. Both computer systems must use the same method of parity checking.

Parity Checking (SCSI)

A simple way of detecting errors in SCSI data that is required to be built into all SCSI-2 devices. Counts the number of 1's in a byte of data and sets a parity bit so that the number is always odd or even. SCSI uses odd parity. You can use parity checking only if all devices on the bus use parity checking. Parity checking will be replaced by CRC in Ultra 4 SCSI.

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