Motorola History - http://www.motorola.com/content.jsp?globalObjectId=115-110 Motorola was founded by Paul V. Galvin as the Galvin Manufacturing Corporation, in Chicago, Illinois, in 1928.
L.A.P.D. Communications - http://www.snowcrest.net/marnells/kjc625.htm#links Unofficial history of the Los Angeles Police Department Communications Division detailed in a series of photographs.
Directorate of Telecommunications (DTELS) - http://www.dtels.org Dedicated to former UK Home Office department responsible for providing wireless communication to Emergency Service and Central Government users from 1939 until it was privatised in 1994.
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