Beeper : A pocket radio paging receiver that emits a high pitched pulsing signal beeping sound when it is actuated, usually by the transmission of a coded tone
Ralph W. Burklin & Robert G. Purington, Fire Terms: A Guide to Their Meaning and Use, National Protection Association, Boston, MA 1980 USA. (Guide: Meaning and Use, Nat Prot Association Fr Srvc - Amer) {457}