- Machine Shop & Tool Repair Service, Bridgeville
- Machinery, Supplies & Equipment - Business Production Related, Bridgeville
- Machinery, Supplies & Equipment - Business Supplies Related, Bridgeville
- Machinery, Supplies & Equipment - Construction & Contractor Related, Bridgeville
- Magazine & Newspaper Stands, Bridgeville - Dealers & Distributors
- Mail Delivery Service, Bridgeville
- Mailbox Rental Services, Bridgeville
- Mailing, Delivery & Courier Service, Bridgeville
- Maintenance, Cleaning & Sanitation, Bridgeville
- Major Appliances, Bridgeville - Household & Kitchen
- Malls & Shopping Centers, Bridgeville
- Management Consultants & Services, Bridgeville
- Manicurists & Pedicurists, Bridgeville
- Manufacturers Agents & Representatives, Bridgeville
- Manufacturers Representative, Bridgeville - Reps, Independent Sales Representative, Sales Agent, etc
- Manufacturing, Bridgeville
- Manufacturing & Industrial Consultants, Bridgeville
- Manufacturing Products, Bridgeville
- Map Publishers & Printers, Bridgeville
- Mapping & Topographical Services, Bridgeville
- Marine Engineers, Bridgeville
- Marriage & Family Counselors, Bridgeville
- Martial Arts & Self Defense Schools, Bridgeville
- Masonry Materials & Supplies, Bridgeville
- Massage Therapists & Professional, Bridgeville
- Massage Therapy, Bridgeville
- Material Handling & Heavy Machinery & Equipment, Bridgeville
- Material Handling Equipment, Bridgeville - Conveyor Belt, Pallet Jack, Forklift, etc
- Meat Brokers, Bridgeville
- Mechanical Engineer, Bridgeville - Mechanical Engineering Service
- Medical & Health Service Organizations, Bridgeville
- Medical Diagnostic Clinics, Bridgeville - Clinical Labs & Centers
- Medical Equipment Manufacturers, Bridgeville
- Medical Supplies & Equipment, Bridgeville
- Membership Sports & Recreation Clubs, Bridgeville
- Men's & Boys Clothing & Accessories Stores, Bridgeville
- Mens & Boys Hats, Gloves & Neckwear, Bridgeville
- Mental Health Specialists, Bridgeville - Psychologist, Psychiatrist, Psychotherapist, etc
- Merchandise Sales Events, Bridgeville
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- Merger & Acquisition Services, Bridgeville
- Metal Goods Alloys, Bridgeville
- Metal Products, Bridgeville
- Metal Repair Service & Blacksmith, Bridgeville - Iron Works
- Metal Specialties, Bridgeville
- Metal Working Machinery, Bridgeville
- Meteorologists, Bridgeville
- Methodist Church, Bridgeville
- Mexican Restaurants, Bridgeville
- Middle Eastern Restaurants, Bridgeville
- Mine Shaft Contractors, Bridgeville
- Mini & Self Storage, Bridgeville
- Mining, Bridgeville
- Mining Consultants, Bridgeville
- Mining Contractors, Bridgeville - Mining Companies, Contractors & Brokers
- Mining, Crude-Oil Production, Bridgeville - Mining Companies
- Miscellaneous Business Services, Bridgeville
- Miscellaneous Manufacturing, Bridgeville
- Miscellaneous Personal Services, Bridgeville
- Miscellaneous Photographers, Bridgeville
- Miscellaneous Professional, Bridgeville
- Monuments, Tombstones, Markers & Memorials, Bridgeville
- Mopeds, Scooter & Mini-Bikes Parts, Accessories & Dealers, Bridgeville
- Mortgage Bankers & Correspondents, Bridgeville
- Motion Picture & Television Production Services, Bridgeville
- Motor Vehicle, Bridgeville
- Motor Vehicle Rental & Leasing, Bridgeville
- Motorcycle Parts, Accessories & Dealers, Bridgeville
- Motorized Bicycle & Scooter, Bridgeville
- Movie Theaters, Bridgeville
- Moving & Storage Supplies & Equipment, Bridgeville
- Moving Companies, Bridgeville
- Moving Truck Rental , Bridgeville
- Muffler Shop & Exhaust Systems, Bridgeville
- Mulch, Peat & Moss Products, Bridgeville
- Museums, Bridgeville
- Music, Bridgeville
- Musical Instruments & Equipment Stores, Bridgeville
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