The Hawker Siddeley Harrier GR.1/GR.3 and the AV-8A Harrier are the first generation of the Harrier series, the first operational close-support and reconnaissance fighter aircraft with Vertical/Short Takeoff and Landing (V/STOL) capabilities, colloquially referred to as a "jump jet". The Harrier was the only truly successful V/STOL design of the many that arose from the 1960s.