CRC Calculator: CRC-16 and CRC-32 calculations. CRC16Dem and CRC32Dem are examples of command-line programs that work in Delphi 1, 2 or 3 (updated 3/20/98). The CRCCalculator interactively shows CRC-16 or CRC-32 for a given string. http://www.efg2.com/Lab/Mathematics/CRC.htm