Metropolitan Planning Organization 
Metropolitan Planning Organizations 
Military Post Office 
Mercury Planetary Orbiter 
Metropolitan Planning Organization's 
Management and Personnel Office 
Manufacturing production order 
Maryland Procurement Office 
maximum power output 
Medical and Pediatric Oncology 
Memorandum Purchase Order 
Microgravity Projects Office 
Mission Planning Office 
Modified plan of operation 
Murabahah for the Purchase Order 
IATA code for Pocono Mountains Municip… 
Main Post Office 
Manufacturer's Point of Origin 
marrow peroxidase 
Maryland Point Observatory 
mast cell peroxidase 
maximal power output 
mean power output 
medial preoptic 
medial preoptic area 
medial preoptic nucleus 
medial preoptic region 
median preoptic nucleus 
Memory Placement Optimization 
Memory Protect Override