- Machinery Movers & Erectors, Irvington
- Machinery, Supplies & Equipment - Business Production Related, Irvington
- Machinery, Supplies & Equipment - Business Supplies Related, Irvington
- Machinery, Supplies & Equipment - Construction & Contractor Related, Irvington
- Magazine & Newspaper Stands, Irvington - Dealers & Distributors
- Mailing, Delivery & Courier Service, Irvington
- Maintenance, Cleaning & Sanitation, Irvington
- Major Appliances, Irvington - Household & Kitchen
- Malls & Shopping Centers, Irvington
- Management Consultants & Services, Irvington
- Manicurists & Pedicurists, Irvington
- Manufacturers Agents & Representatives, Irvington
- Manufacturers Representative, Irvington - Reps, Independent Sales Representative, Sales Agent, etc
- Manufacturing, Irvington
- Manufacturing Products, Irvington
- Marriage & Family Counselors, Irvington
- Martial Arts & Self Defense Schools, Irvington
- Masonry Contractors, Irvington - Stone Mason, Brick Mason - Install & Repair
- Material Handling Equipment, Irvington - Conveyor Belt, Pallet Jack, Forklift, etc
- Meat Market, Wholesale & Products, Irvington
- Medical & Dental Management, Irvington
- Medical & Health Service Organizations, Irvington
- Medical & Infectious Waste Disposal, Irvington
- Medical Equipment, Supplies, Devices & Instruments - Repair & Service, Irvington
- Medical Supplies & Equipment, Irvington
- Men's & Boys Clothing & Accessories Stores, Irvington
- Men's Clothing Stores, Irvington - Clothes & Accessories
- Mens & Boys Belts & Suspenders, Irvington
- Mens & Boys Hats, Gloves & Neckwear, Irvington
- Mens & Boys Jeans & Western Wear Stores, Irvington
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- Mental Health Specialists, Irvington - Psychologist, Psychiatrist, Psychotherapist, etc
- Metal Finishers, Irvington
- Metal Plating & Polishing, Irvington
- Metal Products, Irvington
- Metal Specialties, Irvington
- Metal Windows, Irvington
- Methodist Church, Irvington
- Mexican Restaurants, Irvington
- Middle Eastern Restaurants, Irvington
- Military Supplies, Irvington
- Mining, Irvington
- Miscellaneous Business Services, Irvington
- Miscellaneous Commercial & Industrial Supplies & Equipment Rental & Leasing, Irvington
- Miscellaneous Government, Irvington
- Miscellaneous Manufacturing, Irvington
- Miscellaneous Metal Work Manufacturers, Irvington
- Miscellaneous Photographers, Irvington
- Miscellaneous Professional, Irvington
- Modular & Mobile Homes For Sale, Irvington - Manufactured Homes Sale & Service
- Money Transfer Service, Irvington
- Monuments, Tombstones, Markers & Memorials, Irvington
- Mortgage Bankers & Correspondents, Irvington
- Mortgages & Loans, Irvington
- Motor Vehicle, Irvington
- Motor Vehicle Rental & Leasing, Irvington
- Movie Theaters, Irvington
- Moving Truck Rental , Irvington
- Muffler Shop & Exhaust Systems, Irvington
- Multimedia Publishers, Irvington - Multimedia Services & Systems
- Music, Irvington
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