The following is a data flow diagram for an online car rental system. It covers everything from choosing a car to making the payment. Customers search for available cars, book their preferred vehicle, and proceed to payment. The system processes the payment, confirms the order, and issues an invoice. The car inventory has been updated. The transaction is now recorded in the accounting system. This DFD ensures a smooth and efficient rental process, enhancing customer satisfaction. It shows how real-time inventory management and secure payment processing matter. They help create a smooth user experience for car rentals.