Retnanjingwati, Sinar The Implementation of SST as the System of Room Reservation for Students’ Organization at Atma Jaya BSD Campus. Abstract— The implementation of SST in any organization activity can create a positive outcome and bring less negative response if the system failed. The bureau of students, alumni, and student career counselling at Atma Jaya has difficulties managing a r. ISSN ISSN 2442-7888