- Machinery And Equipment Manufacturers, Trumansburg
- Machinery, Supplies & Equipment - Business Supplies Related, Trumansburg
- Machinery, Supplies & Equipment - Construction & Contractor Related, Trumansburg
- Management Consultants & Services, Trumansburg
- Manufacturing, Trumansburg
- Marine Contractors & Designers, Trumansburg
- Marine Products And Services, Trumansburg
- Marine Repair & Service Stations, Trumansburg
- Marine Supplies & Equipment Repair, Trumansburg - Boat Supplies & Equipment
- Medical Billing Services, Trumansburg
- Methodist Church, Trumansburg
- Mini & Self Storage, Trumansburg
- Miscellaneous Business Product Repair, Trumansburg
- Miscellaneous Agriculture, Trumansburg
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- Miscellaneous Business Services, Trumansburg
- Miscellaneous Government, Trumansburg
- Miscellaneous Personal Services, Trumansburg
- Miscellaneous Professional, Trumansburg
- Mobile Home Parks & Communities , Trumansburg
- Modular & Mobile Homes For Sale, Trumansburg - Manufactured Homes Sale & Service
- Motor Vehicle, Trumansburg
- Mulch, Peat & Moss Products, Trumansburg
- Museums, Trumansburg
- Music, Trumansburg
- Music Lessons, Trumansburg
- Music Lessons - Instrumental, Trumansburg
- Musical Instrument Rental, Trumansburg - Band & Orchestra Instruments
- Musical Instruments Repair, Sales & Service, Trumansburg
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