The Ford F-Series is a series of trucks marketed and manufactured by Ford. In production since 1948, the F-Series is a range of light-duty trucks marketed as full-size pickup trucks, slotted above the compact Ford Ranger in the Ford truck model range. Since 1999, the F-Series also includes the heavier-duty Super Duty series, which includes pickup trucks, chassis cab trucks, and medium-duty trucks. As of current production, the Ford F-Series includes the F-150 pickup, F-250 through F-450 Super Duty pickups, F-450/550 Super Duty chassis cabs, and F-650/750 Super Duty Class 6-8 trucks. The most popular version of the F-Series is the F-150, now in its fourteenth generation.