<![CDATA[The development of information technology has encouraged businesses to adopt web-based systems to support their business processes. Agun Jaya Mobilindo is a used car showroom that still manages vehicle data, customer data, sales transactions, and reports manually, making the process less effective and prone to recording errors. This study aims to design and implement a web-based Car Sales Information System to improve the efficiency of data management and service quality. Data were collected through observation, interviews, literature studies, and documentation, while the system was developed using the Waterfall method. The system was built using PHP and MySQL. The results show that the developed system simplifies the management of vehicle data, customer data, and sales transactions, generates reports automatically, and provides faster access to information for the owner. Therefore, the implemented system is expected to improve operational efficiency and support decision-making at Agun Jaya Mobilindo.]]>
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