- Machine Shop & Tool Repair Service, Scarborough
- Machinery And Equipment Manufacturers, Scarborough
- Machinery, Supplies & Equipment - Business Production Related, Scarborough
- Machinery, Supplies & Equipment - Business Supplies Related, Scarborough
- Machinery, Supplies & Equipment - Construction & Contractor Related, Scarborough
- Magazine & Newspaper Stands, Scarborough - Dealers & Distributors
- Mailing, Delivery & Courier Service, Scarborough
- Major Appliances, Scarborough - Household & Kitchen
- Make Up & Cosmetics Application, Scarborough
- Management Consultants & Services, Scarborough
- Management Training & Development, Scarborough
- Manicurists & Pedicurists, Scarborough
- Manufacturers Agents & Representatives, Scarborough
- Manufacturers Representative, Scarborough - Reps, Independent Sales Representative, Sales Agent, etc
- Manufacturing, Scarborough
- Manufacturing Products, Scarborough
- Marinas & Marina Services, Scarborough
- Marriage & Family Counselors, Scarborough
- Martial Arts & Self Defense Schools, Scarborough
- Masonry Contractors, Scarborough - Stone Mason, Brick Mason - Install & Repair
- Masonry Materials & Supplies, Scarborough
- Massage Therapists & Professional, Scarborough
- Massage Therapy, Scarborough
- Mats & Matting, Scarborough
- Meat Brokers, Scarborough
- Mechanical Contractors, Scarborough - Install, Service & Repair
- Medical Supplies & Equipment, Scarborough
- Membership Sports & Recreation Clubs, Scarborough
- Men's Clothing Stores, Scarborough - Clothes & Accessories
- Men's Shoe Stores, Scarborough
- Mens & Womens Clothing, Scarborough
- Merchandise Sales Events, Scarborough
- Metal Finishers, Scarborough
- Metal Heat Treating, Scarborough
- Metal Plating & Polishing, Scarborough
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- Metal Repair Service & Blacksmith, Scarborough - Iron Works
- Metal Spinning Manufacturers, Scarborough
- Metal Stampings Manufacturers, Scarborough
- Metal Tanks, Scarborough
- Mini & Self Storage, Scarborough
- Mining, Scarborough
- Ministries Church, Scarborough
- Mirrors, Scarborough - Custom, Framed, Bathroom, Vanity & Wall Mirrors
- Miscellaneous Government, Scarborough
- Miscellaneous Manufacturing, Scarborough
- Miscellaneous Metal Work Manufacturers, Scarborough
- Miscellaneous Personal Services, Scarborough
- Miscellaneous Professional, Scarborough
- Money Transfer Service, Scarborough
- Monuments, Tombstones, Markers & Memorials, Scarborough
- Mortgage Bankers & Correspondents, Scarborough
- Mortgage Brokers, Scarborough
- Motion Picture Pre & Post Production Services, Scarborough
- Motor Vehicle, Scarborough
- Motor Vehicle Rental & Leasing, Scarborough
- Motorcycle Repair & Service, Scarborough
- Motorcycles Paint & Refinishing, Scarborough
- Moving & Storage Supplies & Equipment, Scarborough
- Moving Companies, Scarborough
- Moving Truck Rental , Scarborough
- Muffler Shop & Exhaust Systems, Scarborough
- Multimedia Publishers, Scarborough - Multimedia Services & Systems
- Museums, Scarborough
- Music, Scarborough
- Music Lessons, Scarborough
- Music Lessons - Instrumental, Scarborough
- Music Lessons - Vocal, Scarborough
- Musical Instruments & Equipment Stores, Scarborough
- Musical Instruments Repair, Sales & Service, Scarborough
- Musical Recording Services, Scarborough
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