Drive-through is a common term for a service that allows customers to order food or other items without getting out of their vehicle. There are several synonyms for drive-through, including drive-in, drive-up, drive-by, and drive-thru. These terms are used interchangeably in different regions of the world. A drive-in refers to a service where customers park their vehicles and place orders through a speaker, while a drive-up is a service where customers drive directly to a window to order and pick up their items. A drive-by typically refers to mobile food or retail vendors that sell their products from a truck or cart.