Continentals as an option;[9] it became standard in 1971.[10] In 1971, General Motors introduced the "Trackmaster" rear-wheel only[11] ABS as an option on their rear-wheel drive Cadillac models[12][13] and the Oldsmobile Toronado.[14] In the same year, Nissan offered an EAL (Electro Anti-lock System) as an option on the Nissan President, which became Japan's first electronic ABS.[15]