Final answer:
The ACC setting on an ignition switch stands for Automatic Cruise Control. It is a feature in some cars that allows the driver to set and maintain a desired speed without having to continuously press the accelerator pedal.
Step-by-step explanation:
The ACC setting on an ignition switch stands for Automatic Cruise Control. It is a feature in some cars that allows the driver to set and maintain a desired speed without having to continuously press the accelerator pedal. Once the cruise control is set, the car will automatically maintain the chosen speed until the driver either cancels or adjusts the setting.