The term "tank controls" refers to a type of control system commonly used in large, heavy machinery such as tanks and bulldozers. In this system, there are two levers or joysticks that are used to maneuver the vehicle - one for forward/backward movement (usually called "drive") and another for left/right movement (called "track"). The term comes from the fact that these controls were originally designed based on the steering mechanisms of early tanks, which had a driver's seat with two large levers to control the tank's movements. Today, while many modern vehicles use more advanced control systems, the phrase is still used colloquially to refer to any simple, straightforward control system that relies on basic manual inputs.