- Machine Shop & Tool Repair Service, Haddon Township
- Machinery, Supplies & Equipment - Business Supplies Related, Haddon Township
- Management Consultants & Services, Haddon Township
- Manicurists & Pedicurists, Haddon Township
- Manufacturing, Haddon Township
- Manufacturing Products, Haddon Township
- Meat Market, Wholesale & Products, Haddon Township
- Medical Supplies & Equipment, Haddon Township
- Men's Clothing Stores, Haddon Township - Clothes & Accessories
- Mental Health Specialists, Haddon Township - Psychologist, Psychiatrist, Psychotherapist, etc
- Merle Norman Cosmetics, Haddon Township
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- Metal Repair Service & Blacksmith, Haddon Township - Iron Works
- Methodist Church, Haddon Township
- Mexican Restaurants, Haddon Township
- Miscellaneous Government, Haddon Township
- Miscellaneous Photographers, Haddon Township
- Miscellaneous Professional, Haddon Township
- Mortgage Bankers & Correspondents, Haddon Township
- Mortgages & Loans, Haddon Township
- Motor Vehicle, Haddon Township
- Music, Haddon Township
- Musical Instruments & Equipment Stores, Haddon Township
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