You may not think much about the backup camera in your car, but it's an absolute godsend when reversing or parking in tight spaces. Back in the old days, reversing a car meant craning your neck to the point of whiplash, and it seems Buick was listening when it unveiled the Centurion concept in 1956, the first car with a backup camera. We're not sure why it took so long, but the NHTSA made backup cameras mandatory 8 years ago.