Office equipment used by the War Production Board (WPB). Telegraph services for the Office of War Information (OWI), the War Manpower Commission (WMC), and the Office of Price Administration (OPA), as well as for the WPB, go through the Business Management Branch of the WPB's Administrative Division. This unit, which contains twenty-two teletype machines and eight receiving sets, sends out an average of 3,000 messages daily