In a message dated 1/28/2005 3:19:12 PM Central Standard Time, damiross3@xxxxxxxxxxx writes: Not quite true. There was the 720. And the succession shown above is not correct. The 717 came last. The first 717 was actually a military version of the 707. Also, if I'm not mistaken, the 767 saw service before the 757. The 720 was a version of the 707, just shortened. It actually had another name that was 707-XXX but 720 was the one used. The 717 was indeed the internal Boeing name for the KC-135 but they swapped over to using the military designation (remember, the KC-135 is narrower than the 707). The 767 did see service before the 757, but the 757 was designed first