O & O station

Radio and television stations owned and operated by a network.

Off card

Refers to advertising time sold at a rate that does not appear on the rate card.

On-air tests

Tests recall among viewers of a commercial or program during a real broadcast of the tested communication.

On-pack (On-pack Premium)

Used to promote sales of a product. Discount coupons or gifts that are attached to or accompany the product to be purchased.

Open end

(1) Time left at the end of a commercial or program which is provided for the use of local advertising or station identification.

(2) A radio or television program with no specific time to end.