Nab n. : The summit of an eminence.

Nab n. : The cock of a gunlock.

Nab n. : The keeper, or box into which the lock is shot.

Nab v. t. : To catch or seize suddenly or unexpectedly.

Example:
Why are there different rules during the Nab Cup?

Taxonomy
National Association of Broadcasters, NAB, radio, Washington DC, local radio, radio and television, Radio Heard, Congress, San Antonio, Texas, Webcast, March 1, Working for You, Your Stories, successes, innovative ideas, Tax, record label, performance fee.

Defination from the web:
Full-service trade association that represents the interests of free, over-the-air radio and television broadcasters.