BPO - GPO - PO - BT BRITISH POST OFFICE TELEPHONES AUDIOLINE AUTOMATIC ELECTRIC COMPANY AEI AUTOMATIC TELEPHONE COMPANY BIRKBYS PLASTICS BRITISH ERICSSON DENNIS FERRANTI METERS Ltd DORO GEC GEC - The Telephone Works HULL L. M. ERICSSON PLESSEY METROPOLITAN-VICKERS MITEL PEEL CONNER SIEMENS AG SIEMENS BROTHERS SIEMENS AND HALSKE STC - PROPOSED ACQUISITION BY ALCATEL STROWGER AUTOMATIC TELEPHONE COMPANY TELECOM SCIENCES CORPORATION Ltd TELEPHONE RENTALS UK COMMUNICATIONS HISTORY
