A numeric value, which has been calculated mathematically, is added to data to ensure that original data have not been altered or that an incorrect, but valid match has occurred. Scope Notes: Check di [..]

See Error detecting characters.

A check digit is a number added to each character in a coded system which allows for the detection of errors; through the use of a mathematical formula, recording errors such as number reversals can b [..]

A digit, derived from and appended to a data item, for later use in error detection and possibly error correction.

The last number in a UPC that is used to verify the accuracy of the code. See Webopedia��s definition of UPC for how check digits are calculated.

A character added to a sequence of digits, related arithmetically to the sequence in such a way that input errors can be automatically detected whenever the sequence is entered as data into a computer [..]

  A traffic document number that consists of a 3-digit carrier accounting code, a 10-digit form code, a serial number, and a check digit. The Modulus 7 check digit routine is used for Standard Traffic [..]

Final digit of an ISBN

Dating back to keypunches, id numbers have an appended check digit used to ensure that the number was keyed properly. The various types of bar code such as the UPC (Universal Product Code) you see on [..]

A check digit is a digit added to a string of numbers for error detection purposes. Normally, the check digit is computed from the other digits in the string. A check digit helps digital systems detec [..]

A single-digit checksum. ''The last digit of the barcode is a check digit, calculated from the others.''

A check digit is the 7th number of a container that calculates off of the prefix and 6 previous digits of the container number allowing for verification of the accuracy of the container number.