Malta Standards Authority 
Metropolitan Statistical Area 
Minimum Safe Altitude 
Medical Savings Account 
Mail Submission Agent 
Material Service Area 
Master Services Agreement 
Mechanical Signature Analysis 
Microgravity Science and Applications 
Management Services Architecture 
Measurement System Analysis 
Mission Safety Assessment 
Modeling Systems Analysis 
mammary serum antigen 
Management Support Assistant 
management System Audts 
Marine Science Activities 
Maritime Safety Agency 
Marshall Sprayable Ablation 
Master Senior Appraiser 
master settlement agreement 
Measurement Systems Analysis 
medical services account 
Message Service Application 
Metropolitan Service Area 
Metropolitan Statistic Area 
Metropolitan Statistical Areas 
Microscopy Society of America 
Mine safety appliance 
mine safety appliances