- Machinery And Equipment Manufacturers, Summerfield
- Machinery, Supplies & Equipment - Business Production Related, Summerfield
- Machinery, Supplies & Equipment - Business Supplies Related, Summerfield
- Mail Delivery Service, Summerfield
- Make Up & Cosmetics Application, Summerfield
- Management Consultants & Services, Summerfield
- Manicurists & Pedicurists, Summerfield
- Manufactured & Mobile Home Movers & Transporting, Summerfield
- Manufacturing, Summerfield
- Manufacturing Products, Summerfield
- Markets & Grocers Equipment, Summerfield
- Massage Therapy, Summerfield
- Meat Markets Kosher, Summerfield
- Medical Equipment, Supplies, Devices & Instruments - Repair & Service, Summerfield
- Medical Research, Summerfield
- Medical Research & Development, Summerfield - Medical Information & Research
- Medical Supplies & Equipment, Summerfield
- Membership Sports & Recreation Clubs, Summerfield
- Metal Repair Service & Blacksmith, Summerfield - Iron Works
- Metaphysical Churches, Summerfield
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- Mini & Self Storage, Summerfield
- Ministries Church, Summerfield
- Miscellaneous Fabricated Wire Products Manufacturers, Summerfield
- Miscellaneous Agriculture, Summerfield
- Miscellaneous Government, Summerfield
- Miscellaneous Personal Services, Summerfield
- Miscellaneous Photographers, Summerfield
- Miscellaneous Professional, Summerfield
- Mobile Home Parks & Communities , Summerfield
- Mortgage Bankers & Correspondents, Summerfield
- Mortgages & Loans, Summerfield
- Motion Picture & Television Production Services, Summerfield
- Motion Picture Dists & Producers, Summerfield
- Motor Vehicle, Summerfield
- Motor Vehicle Rental & Leasing, Summerfield
- Moving Truck Rental , Summerfield
- Mulch, Peat & Moss Products, Summerfield
- Music, Summerfield
- Musical Instruments & Equipment Stores, Summerfield
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