- Machinery, Supplies & Equipment - Business Supplies Related, Sonora
- Machinery, Supplies & Equipment - Construction & Contractor Related, Sonora
- Mailing, Delivery & Courier Service, Sonora
- Management Consultants & Services, Sonora
- Manufacturing, Sonora
- Masonry Materials & Supplies, Sonora
- Medical Supplies & Equipment, Sonora
- Membership Sports & Recreation Clubs, Sonora
- Merle Norman Cosmetics, Sonora
- Methodist Church, Sonora
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- Mexican Restaurants, Sonora
- Mining, Sonora
- Miscellaneous Agriculture, Sonora
- Miscellaneous Business Services, Sonora
- Miscellaneous Government, Sonora
- Miscellaneous Manufacturing, Sonora
- Mortgage Companies, Sonora
- Motor Vehicle, Sonora
- Muffler Shop & Exhaust Systems, Sonora
- Museums, Sonora
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