- Machinery, Supplies & Equipment - Business Production Related, Houghton
- Machinery, Supplies & Equipment - Construction & Contractor Related, Houghton
- Magazine & Newspaper Stands, Houghton - Dealers & Distributors
- Major Appliances, Houghton - Household & Kitchen
- Malls & Shopping Centers, Houghton
- Manufacturers Agents & Representatives, Houghton
- Manufacturers Representative, Houghton - Reps, Independent Sales Representative, Sales Agent, etc
- Manufacturing, Houghton
- Marinas & Marina Services, Houghton
- Masonry Materials & Supplies, Houghton
- Mental Health Clinics, Houghton - Treatment Centers
- Mental Health Specialists, Houghton - Psychologist, Psychiatrist, Psychotherapist, etc
- Metal Buildings, Houghton - Kits, Homes, Steel Buildings, etc
- Metal Repair Service & Blacksmith, Houghton - Iron Works
- Metaphysical Churches, Houghton
- Methodist Church, Houghton
- Mexican Restaurants, Houghton
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- Miscellaneous Retail Stores, Houghton
- Miscellaneous Agriculture, Houghton
- Miscellaneous Business Services, Houghton
- Miscellaneous Government, Houghton
- Miscellaneous Manufacturing, Houghton
- Miscellaneous Photographers, Houghton
- Miscellaneous Professional, Houghton
- Mortgages & Loans, Houghton
- Motion Picture Pre & Post Production Services, Houghton
- Motor Vehicle, Houghton
- Motor Vehicle Rental & Leasing, Houghton
- Moving Truck Rental , Houghton
- Muffler Shop & Exhaust Systems, Houghton
- Music, Houghton
- Music Lessons, Houghton
- Music Lessons - Instrumental, Houghton
- Musical Instrument Rental, Houghton - Band & Orchestra Instruments
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