Outside broadcasting (OB) is the electronic field production (EFP) of television or radio programmes (typically to cover television news and sports television events) from a mobile remote broadcast television studio.  Professional video camera and microphone signals come into the production truck for processing, recording and possibly transmission. The mobile production control room (PCR) is known as a "production truck", "scanner" (a BBC term), "mobile unit", "remote truck", "live truck", "OB van" or "live eye". In the United States an "OB van" is smaller in size than a production truck and generally require two or three people in the field to manage. For instance, broadcast journalism news reporters providing live television, local news in the field outside a formal television studio.