- Machinery, Supplies & Equipment - Business Production Related, Narragansett
- Machinery, Supplies & Equipment - Construction & Contractor Related, Narragansett
- Mailbox Rental Services, Narragansett
- Mailing, Delivery & Courier Service, Narragansett
- Maintenance, Cleaning & Sanitation, Narragansett
- Management Consultants & Services, Narragansett
- Manicurists & Pedicurists, Narragansett
- Manufacturers Agents & Representatives, Narragansett
- Manufacturing, Narragansett
- Manufacturing Products, Narragansett
- Marine Contractors & Designers, Narragansett
- Marine Electronic Equipment, Narragansett
- Marine Products And Services, Narragansett
- Marine Repair & Service Stations, Narragansett
- Marine Supplies & Equipment, Narragansett - Boat Supplies
- Marine Supplies & Equipment Repair, Narragansett - Boat Supplies & Equipment
- Martial Arts & Self Defense Schools, Narragansett
- Masonry Contractors, Narragansett - Stone Mason, Brick Mason - Install & Repair
- Massage Therapists & Professional, Narragansett
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- Massage Therapy, Narragansett
- Meat Market, Wholesale & Products, Narragansett
- Medical Supplies & Equipment, Narragansett
- Membership Sports & Recreation Clubs, Narragansett
- Middle Eastern Restaurants, Narragansett
- Mildew Removal & Control, Narragansett - Mold Removal
- Miscellaneous Government, Narragansett
- Miscellaneous Manufacturing, Narragansett
- Miscellaneous Personal Services, Narragansett
- Miscellaneous Photographers, Narragansett
- Miscellaneous Professional, Narragansett
- Mission Churches, Narragansett
- Mortgage Bankers & Correspondents, Narragansett
- Motor Vehicle, Narragansett
- Motorcycle Parts, Accessories & Dealers, Narragansett
- Moving & Storage Supplies & Equipment, Narragansett
- Moving Companies, Narragansett
- Muffler Shop & Exhaust Systems, Narragansett
- Museums, Narragansett
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