The Willys CJ (later Jeep CJ) (or Civilian Jeep) is a public version of the famous Willys Military Jeep from World War II.
1954 Willys Jeep CJ-3B
The first CJ prototype (the Willys CJ-2) was introduced in 1944 by Willys, and the same basic vehicle stayed in production through seven variants and three corporate parents until 1986.
A variant of the CJ is still in production today under license. The last CJs, the CJ-7 and CJ-8, were replaced in 1987 by the Jeep Wrangler.
Also available were two-wheel-drive variants, known as DJs.
Source: Wikipedia, 2012