| METS | Mariano Ended Their Season 
| Others |
| METS | Marine Energy Technology Symposium
| Others |
| METS | Marine Equipment Trade Show
| Others |
| METS | Maryland Equine Transition Service
| Others |
| METS | Materials and Equipment Trading Service
| Others |
| METS | Mayor's Emergency Telephone System
| Others |
| METS | Mechanized Export Traffic System
| Others |
| METS | METabolic EquivalentS
| Others |
| METS | Metabolic Syndrome
| Others |
| METS | Metadata Encoding and Transmission Standard
| Others |
| METS | Metadata Encoding Transmission Standard
| Others |
| METS | Metastases
| Others |
| METS | METeorological System
| Others |
| METS | Metropolitan Education and Training Services
| Others |
| METS | Metropolitan Evansville Transit System
| Others |
| METS | Mets Entire Team Sucks
| Others |
| METS | Microarrays Expanded for Transcriptional Screening
| Others |
| METS | Mini-Effluent Treatment System
| Others |
| METS | Mining Equipment and Technology Suppliers
| Others |
| METS | Mining Equipment Technology and Services
| Others |
| METS | Mir Electrodynamic Tether System
| Others |
| METS | Mobile Entry Training Simulator
| Others |
| METS | Mobile Examining Team Site
| Others |
| METS | Modular Escape Training Simulator
| Others |
| METS | More Expectations Than Success
| Others |
| METS | Multidisciplinary Education Training and Support
| Others |
| METS | My Entire Team Stinks
| Others |
| METS | My Entire Team sucks
| Others |
| METS | My Entire Team's Stoned
| Others |
| METS | New York Metropolitans
| Others |