- Machine Shop & Tool Repair Service, Salem
- Major Appliances, Salem - Household & Kitchen
- Malls & Shopping Centers, Salem
- Management Consultants & Services, Salem
- Marriage & Family Counselors, Salem
- Martial Arts & Self Defense Schools, Salem
- Masonry Contractors, Salem - Stone Mason, Brick Mason - Install & Repair
- Medical & Dental Management, Salem
- Medical Management & Business Administration Service, Salem
- Mexican Restaurants, Salem
- Mining, Salem
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- Mining Contractors, Salem - Mining Companies, Contractors & Brokers
- Mining, Crude-Oil Production, Salem - Mining Companies
- Miscellaneous Government, Salem
- Miscellaneous Industry, Salem
- Mortgage Bankers & Correspondents, Salem
- Mortgage Contracts & Services, Salem
- Mortgages & Loans, Salem
- Motion Picture Pre & Post Production Services, Salem
- Motor Vehicle, Salem
- Motorcycle Parts, Accessories & Dealers, Salem
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