- Machine Shop & Tool Repair Service, New Windsor
- Machinery, Supplies & Equipment - Business Production Related, New Windsor
- Machinery, Supplies & Equipment - Business Supplies Related, New Windsor
- Machinery, Supplies & Equipment - Construction & Contractor Related, New Windsor
- Mailbox Rental Services, New Windsor
- Mailing, Delivery & Courier Service, New Windsor
- Maintenance, Cleaning & Sanitation, New Windsor
- Management Consultants & Services, New Windsor
- Manicurists & Pedicurists, New Windsor
- Manufacturing, New Windsor
- Manufacturing Products, New Windsor
- Marine Contractors & Designers, New Windsor
- Marriage & Family Counselors, New Windsor
- Martial Arts & Self Defense Schools, New Windsor
- Masonry Materials & Supplies, New Windsor
- Massage Therapists & Professional, New Windsor
- Massage Therapy, New Windsor
- Meat Market, Wholesale & Products, New Windsor
- Mechanical Engineer, New Windsor - Mechanical Engineering Service
- Medical Billing Services, New Windsor
- Medical Diagnostic Clinics, New Windsor - Clinical Labs & Centers
- Medical Supplies & Equipment, New Windsor
- Membership Sports & Recreation Clubs, New Windsor
- Mental Health Specialists, New Windsor - Psychologist, Psychiatrist, Psychotherapist, etc
- Metal Finishers, New Windsor
- Metal Plating & Polishing, New Windsor
- Metal Services, New Windsor
- Metal Specialties, New Windsor
- Mexican Restaurants, New Windsor
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- Mildew Removal & Control, New Windsor - Mold Removal
- Mini & Self Storage, New Windsor
- Mining, New Windsor
- Miscellaneous Government, New Windsor
- Miscellaneous Industry, New Windsor
- Miscellaneous Manufacturing, New Windsor
- Miscellaneous Personal Services, New Windsor
- Miscellaneous Professional, New Windsor
- Mission Churches, New Windsor
- Modular & Mobile Homes For Sale, New Windsor - Manufactured Homes Sale & Service
- Monuments, Tombstones, Markers & Memorials, New Windsor
- Mortgage Bankers & Correspondents, New Windsor
- Motion Picture & Television Production Services, New Windsor
- Motion Picture Pre & Post Production Services, New Windsor
- Motor Vehicle, New Windsor
- Motor Vehicle Rental & Leasing, New Windsor
- Motorcycle & Motor Scooters Dealers, Repair & Service, New Windsor
- Motorcycle Parts, Accessories & Dealers, New Windsor
- Motorcycle Repair & Service, New Windsor
- Movie Theaters, New Windsor
- Moving & Storage Supplies & Equipment, New Windsor
- Moving Companies, New Windsor
- Moving Truck Rental , New Windsor
- Music, New Windsor
- Music Lessons, New Windsor
- Music Lessons - Instrumental, New Windsor
- Musical Instrument Rental, New Windsor - Band & Orchestra Instruments
- Musical Instruments & Equipment Stores, New Windsor
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