SMSS

SMSS may refer to:


 * Session Manager Subsystem (smss.exe), a component of the Microsoft Windows NT operating system
 * Switching and Management Subsystem, in wireless communication technology
 * Squad Mission Support System, military robotic system developed by Western company Lockheed Martin
 * St. Margaret's Secondary School, a government-aided autonomous girls' secondary school in Bukit Timah, Singapore
 * Sailor Moon SuperS, the fourth season of the anime series Sailor Moon
 * SkyMapper Sky Survey