JAST - Joint Advanced Strike Technology

Program that became the F-35 Joint Strike Fighter Program. Its original goals were maturing technologies, developing requirements and demonstrating concepts for affordable, next-generation joint strike fighter warfare.

JPO - Joint Program Office

The program management team consisting of U.S. Air Force, Navy and Marine Corps personnel, made up of integrated product teams responsible for F-35 systems, tests, operations and functional support.

JSF - Joint Strike Fighter

The name given to the program when it moved into the Concept Definition Phase, representing the requirement to produce aircraft with common components for the Air Force, Marine Corps and Navy.