This document defines common broadcast terms used in radio and television. It describes terms related to station identification, time checks, program introductions and closings, commercials, credits, and other elements of broadcast programming, operations, and regulation. Key terms include station ID, time check, spiel, sign on/off, opening/closing billboards, commercial spots, plugs, breaks, bumpers, credits, and program grids. The document provides definitions and examples to explain how these various elements fit together to produce radio and television broadcasts.