The first drive-through window was introduced by the U.S. fast food chain In-N-Out Burger in 1948.
In-N-Out Burger was founded by Harry and Esther Snyder in 1948 in Baldwin Park, California. The Snyders were the first to introduce the concept of a drive-through window, allowing customers to order food without leaving their cars. This concept quickly spread to other fast food chains, and drive-through windows are now a common feature of many fast food restaurants.