Today and on some Jeep vehicles, these two suffixes can be found in many Dodge vehicles. In its roots, which were purely Dodge, 'SRT' refers to 'Street and Race technology' and to a high-performance car category designed to produce heavy, aggressive vehicles within FCA. The group began with Dodge Viper, which was always popular, and finally started working on the Dodge Challenger SRT Hellcat and the Dodge Challenger SRT Demon. The SRT name for Jeep Grand Cherokee SRT, but not the Jeep Grand Cherokee Trackhawk, has recently been shared with the Jeep automotive brand. "R / T" is also unique to Dodge, used for selected trims since the 1960s. The phrase "R / T" means "road/track," and the two terms are "slash," just like the SRT's "Street and Racing Technology," as if they were one and the same.