= CRC =
A cyclic redundancy check (CRC) is an error-detecting code.

http://en.wikipedia.org/wiki/Cyclic_redundancy_check
http://en.wikipedia.org/wiki/Computation_of_cyclic_redundancy_checks 

== CRC-16-IBM ==
Bisync, Modbus, USB, ANSI X3.28, SIA DC-07, many others; also known as CRC-16 and CRC-16-ANSI

||Normal||Reversed||Reversed reciprocal||
||0x8005||0xA001||0xC002||