- Machine Shop, Orefield
- Machinery, Supplies & Equipment - Business Production Related, Orefield
- Machinery, Supplies & Equipment - Construction & Contractor Related, Orefield
- Management Consultants & Services, Orefield
- Manicurists & Pedicurists, Orefield
- Manufacturers Agents & Representatives, Orefield
- Manufacturers Representative, Orefield - Reps, Independent Sales Representative, Sales Agent, etc
- Manufacturing, Orefield
- Market Research & Analysis , Orefield - Market Analysis, Business & Economic Research
- Marriage & Family Counselors, Orefield
- Masonry Contractors, Orefield - Stone Mason, Brick Mason - Install & Repair
- Medical & Dental Management, Orefield
- Medical Management & Business Administration Service, Orefield
- Membership Sports & Recreation Clubs, Orefield
- Mental Health Specialists, Orefield - Psychologist, Psychiatrist, Psychotherapist, etc
- Miscellaneous Agriculture, Orefield
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- Miscellaneous Government, Orefield
- Miscellaneous Manufacturing, Orefield
- Miscellaneous Photographers, Orefield
- Mobile Home Parks & Communities , Orefield
- Modular & Mobile Homes For Sale, Orefield - Manufactured Homes Sale & Service
- Mortgage Bankers & Correspondents, Orefield
- Motor Vehicle, Orefield
- Movie Theaters, Orefield
- Mulch, Peat & Moss Products, Orefield
- Music, Orefield
- Music Lessons, Orefield
- Music Lessons - Instrumental, Orefield
- Music Schools, Orefield
- Music Sheet, Orefield
- Music Stores Retail, Orefield
- Musical Recording Services, Orefield
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