touchback - (American football) a play in which the opposing team has kicked the football into your end zone.
From Wikipedia, the free encyclopedia. A check digit is a form of redundancy check used for error detection on identification numbers, such as bank account numbers, which are used in an application where they will at least sometimes be input manually. It is analogous to a binary parity bit used to check for errors in computer-generated data.
The routing number on a check is located on the bottom left corner of the check, states U.S. Bank. It is a nine-digit number that identifies the bank location where the account was opened. Full Answer >.