UAV (unmanned, autonomous vehicle) - a cruise missile, but could be used for other applications such as assessing hazardous disaster scenes. There is no controlling ground link for a UAV as in an RPV (remotely piloted vehicle)

Here's a link to a UAV - http://www.wpafb.af.mil/museum/annex/an5.htm

Here's a link to an RPV -
http://www.wpafb.af.mil/museum/annex/an5.htm

Bruce