"Airborne Warning and Control System" is a term used for one specific system, while "airborne early warning and control" is a general term for all systems that fall under that category. In Ace Combat games, the term AWACS is the only one used, while AEW&C is never referred to. Aircraft that utilize an AWACS use "AWACS" as a prefix to their callsign; for example, AWACS SkyEye rather than just SkyEye. However, pilots have referred to them as either just AWACS or their actual callsign, but rarely both. AWACS generally fulfill the following purposes: