Learning Management System 
Life and Microgravity Spacelab 
Learning Management Systems 
Life and Microgravity Sciences 
Lightweight Multipurpose Shelter 
Link Monitoring System 
Logistics Master Schedules 
London Mathematical Society 
Local Management of Schools 
Local Monitoring Subsystem 
Location and Monitoring Service 
Logistics Management System 
lunar module simulator 
Land Mobile Service 
Laser Magnetic Storage 
Laser Metrology System 
Library Maintenance System 
Library Management System 
Lightning Mapper Sensor 
Local Measured Service 
Land Mobile Station 
Langley Management System 
Least Mean Square 
Least Mean Square Error 
Least Mean Squares 
Let Me See 
Link Management System 
Load Measurement System 
Load Monitor System 
Local Message Switch