Outside broadcasting (OB) is the electronic field production 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 studio control room (SCR) is known as a "production truck” or "OB Van”. Normally an "OB van" is smaller in size than a production truck and generally require two or three people in the field to manage. A typical OB van is usually divided into five parts.