This project independent study on the Online Sale System of SmileComputer System.The objective is to design and develop Online Sale System of SmileComputer. To be used for expanding sales channels through the Internet network. The customers can order to buy product through the website without having to choose to buy at the store. The owner can check in order to buy goods for customers and report sales from websites.
Development operating system has 4 steps are the 1) Study and collection of data. 2) Systems analysis 3) design developmemt. Techniques to design and analyze system are data flow diagram and ER-Diagram. Online Sale System of SmileComputer System was done by PHP language.