Toyota demonstrates its "pre-collision system," which uses automatic steering in addition to automatic braking to prevent collisions, in Tokyo in 2013. Different manufacturers use different names for systems like this, which can be confusing, a AAA report found. Yoshikazu Tsuno/AFP/Getty Images hide caption
An unmanned automobile competes in the i-VISTA (Intelligent Vehicle Integrated Systems Test Area) Autonomous Driving Challenge on August 18 in Chongqing, China. VCG/Getty hide caption
The U.S. Army's Autonomous Remote Engagement System is mounted on the Picatinny Lightweight Remote Weapon System and coupled with an M240B machine gun. It's part of a program that reduces the time to identify targets using automatic target detection and user-specified target selection. U.S. Army hide caption
The robotic skull of a T-600 cyborg used in the movie Terminator 3. Eduardo Parra/Getty Images hide caption
Google's self-driving prototype car can be found cruising the streets near the Internet company's Silicon Valley headquarters to test programming responses to a variety of situations. Tony Avelar/AP hide caption
New autopilot features are demonstrated in a Tesla Model S during a Tesla event in Palo Alto, Calif., Wednesday. Beck Diefenbach/Reuters/Landov hide caption