The Atari 2600 (originally known as the Atari VCS which stood for Video Computer System) was Atari's first and most successful videogame console. It was powered by a 6507 and had a cartridge slot; 2 joystick ports; TV mode toggle switch (which toggled between black & White and color); two difficulty toggles; and a TV RF-Jack.
Due to the type of port, many machines controllers were at least physically compatible with the Atari 2600.
There are many clones of the 2600, also Atari made the [[Atari 2700] which were the same system with prototype hardware. Atari 2800 was the Japanese Atari 2600.