In the United States, the term "supercar" predates the classification of muscle car. It describes the "dragstrip bred" affordable mid-size cars of the 1960s and early 1970s that were equipped with large, powerful V8 engines and rear wheel drive. The term was often (though not always) spelled with a capital S. The combination of a potent engine in a lightweight car began with the 1957 Rambler Rebel that was described as a "veritable supercar". "In 1966 the sixties supercar became an official industry trend" as the four domestic automakers "needed to cash in on the supercar market" with eye-catching, heart-stopping cars. Among the numerous examples of the use of the supercar description include the May 1965 issue of the American magazine Car Life, in a road test of the Pontiac GTO, as well as how "Hurst puts American Motors into the Supercar club with the 390 Rogue" (the SC/Rambler) to fight in "the Supercar street racer gang" market segment. The "SC" in the model name stood for "SuperCar". The supercar market segment included regular production models in different muscle market segments (such as the "economy supercar" ), as well as limited edition, documented dealer-converted vehicles.