A routing transit number (RTN) is a unique nine-digit numerical code used to identify a physical bank, digital bank, or other financial institution.

A bank identification number (BIN) is the initial set of four to six numbers on a credit card that identifies the lending institution. It helps merchants track transactions.

In order to establish and maintain a Handicap Index, a player must be a member of an authorized golf club. Most golf courses, public and private, are authorized.