Aliazki Pratama, Henky, and Bias Yulisa Geni. 2026. “Web-Based POS System to Support Perfume Sales Transactions Using the Waterfall Model: Web-Based POS System to Support Perfume Sales Transactions Using the Waterfall Model”. Journal of Information Systems and Technology Research 5 (3):343-55. https://doi.org/10.55537/jistr.v5i3.1535.