Main Propulsion System 
Maritime Prepositioning Ships 
Master Production Scheduling 
Mission Planning System 
Master Production Schedule 
Maritime Prepositioning Ship 
MultiPage Signal 
Master Program Schedule 
meters per second 
Modular Power System 
Mathematical and Physical Sciences 
Modular Power Subsystem 
Maritime Prepositioned Ships 
Material Processing Specification 
Material Processing System 
materials processing in space 
Mathematical Programming System 
Media Processing System 
Microlensing Planet Search 
Military Postal Service 
Multi Program Support 
Multiple Priority System 
multiple protective structure 
Maintenance Processor Subsystem 
Maritime Preposition Ships 
Maritime Pre-Positioning Ships 
Maritime Prepositioning Squadron 
Master of Professional Studies 
Materiel Planning Study 
Mechanically Pumped System