Batman first appeared 75 years ago, in May of 1939 in Detective Comics #27. Although the first true Batmobile did not appear for another two years, it has become one of the Dark Knight's best known weapons.
The Batmobile made its career debut in Batman #5, then appeared on a comic cover for the first time for Batman #20. Because of different artists' interpretations of what the car should be, it changed size, shape, and features frequently. Later, as the car was marketed beyond the comics, more forms appeared based on practical or aesthetic considerations. In the 1960s, the first full size, fully operational Batmobile was built for the TV show Batman, and had to face financial and functional questions. A few years later the design of this car would be modified for use in the Superfriends cartoon series, with the unique considerations of making a car that could be easily drawn repeatedly for animation. Then, nearly three decades after the TV series, Batman returned to live action with Warner Brothers Batman movies. At about the same time, Batman: The Animated series came out, with a whole new take on the design of Batman and his universe. All of this was on top of the natural evolution of the car over 60+ years, taking into account new technological features like the jet engine and the computer.