Short Message Service Systems Management Server Short Messaging Service Safety Management Systems Service Management System Storage Management Services Shuttle Mission Simulator Stores Management System Safety Management System Service Management Solution Space Motion Sickness Storage Management Subsystem Single Mobility System Synchronous Meteorological Satellite System Managed Storage Scalable Modeling System Short Message Services Solar Mass Sensor System Management Server SALMSON Sample Manipulation System Satellite Multi Service Satellite Multi-Service System Security Management System Sega Master System Separation Mechanism Subsystem Solar Maximum Satellite Strategic Missile Squadron Structures and Mechanisms Subsystem Subscriber Management System