There are 3 cab styles for the Ford F-150. A Standard cab, Supercab (extended cab) and Supercrew (Crew cab).
Standard cab: This is the standard 2 door more. Newer versions also have 2 mini doors behind the regular doors.
Super Cab: At one time was able in 2 door and 3 door models. Now, the Supercab comes with 4 doors, two regular door and 2 reverse doors.
Super Crew: Began in 2001 and has 4 regular doors. It is similar to GM’s version of the crew cab