1) The document discusses designing an information system for incoming and outgoing letters at the library of a town in Indonesia to improve the organization, accuracy, and speed of letter processing. 2) Currently, letter processing is not computerized and prone to errors. The new system aims to implement an organized, accurate, and consistent record keeping and archiving system using suitable information technology. 3) The research aims to design an incoming and outgoing letter information system (APSMK) to allow for organized, accurate, and consistent administration and provide needed information quickly, precisely, and accurately using qualitative methods and VB.NET programming software.