Category
page 1General Post Office
BT Tower
communications tower located in Fitzrovia, London, England, UK

General Post Office
postal system in the United Kingdom
GPO Film Unit
film production company
Radio-paging code No. 1
thumb|right|An NEC pager, using POCSAG coding branded for the Skyper networkRadio-paging code No. 1 (usually and hereafter called POCSAG) is an asynchronous protocol used to transmit data to pagers. Its usual designation is an acronym of the Post Office Code Standardisation Advisory Group, the name of the group that developed the code under the chairmanship of the British Post Office that used to operate most telecommunications in Britain before privatization.