- Machinery And Equipment Manufacturers, Melville
- Machinery, Supplies & Equipment - Business Production Related, Melville
- Machinery, Supplies & Equipment - Business Supplies Related, Melville
- Machinery, Supplies & Equipment - Construction & Contractor Related, Melville
- Magazine Ads, Melville - Periodical Advertising
- Mail Delivery Service, Melville
- Major Appliances, Melville - Household & Kitchen
- Manicurists & Pedicurists, Melville
- Manufacturers Agents & Representatives, Melville
- Manufacturers Representative, Melville - Reps, Independent Sales Representative, Sales Agent, etc
- Manufacturing, Melville
- Manufacturing Products, Melville
- Marriage & Family Counselors, Melville
- Martial Arts & Self Defense Schools, Melville
- Massage Therapy, Melville
- Meat Market, Wholesale & Products, Melville
- Meat Packers, Melville
- Medical & Health Service Organizations, Melville
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- Membership Sports & Recreation Clubs, Melville
- Mexican Restaurants, Melville
- Mining, Melville
- Miscellaneous Government, Melville
- Miscellaneous Industry, Melville
- Miscellaneous Manufacturing, Melville
- Miscellaneous Personal Services, Melville
- Miscellaneous Professional, Melville
- Monuments, Tombstones, Markers & Memorials, Melville
- Mortgage Bankers & Correspondents, Melville
- Mortgage Brokers, Melville
- Motor Vehicle, Melville
- Motor Vehicle Rental & Leasing, Melville
- Movie Theaters, Melville
- Moving Companies, Melville
- Moving Truck Rental , Melville
- Muffler Shop & Exhaust Systems, Melville
- Museums, Melville
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