Hengki Gunawan, Barany Fachri and Fahmi Kurniawan 2025. Designing a Web-Based Management Information System for Incoming and Outgoing Mail at the Public Welfare Bureau of the North Sumatra Provincial Secretariat. International Journal of Health Engineering and Technology. 4, 3 (Sep. 2025). DOI:https://doi.org/10.55227/ijhet.v4i3.348.