This report is written based on the trading system in YC Motor, Tangerang. The computerized system is developed according to the writer’s experience of work in that company and is also based on the user requirements formulated by the director of the YC Motor.The writer made a system for inputting data and transactions in YC Motor. The system was also includes reports for certain period of time . The system was made in order to improve the efficiency of the current system with the aim to be easier to organize system. System development approach is used in developing the system. Process modeling and data modeling concepts are the fundamental theories that are applied in this report. Processes are described using Data Flow Diagram, each data is explained in greater detail by using data dictionary.