- Machinery, Supplies & Equipment - Business Production Related, Jacksonville
- Machinery, Supplies & Equipment - Business Supplies Related, Jacksonville
- Machinery, Supplies & Equipment - Construction & Contractor Related, Jacksonville
- Manicurists & Pedicurists, Jacksonville
- Manufacturing, Jacksonville
- Marriage & Family Counselors, Jacksonville
- Masonry Materials & Supplies, Jacksonville
- Massage Therapists & Professional, Jacksonville
- Massage Therapy, Jacksonville
- Medical Supplies & Equipment, Jacksonville
- Membership Sports & Recreation Clubs, Jacksonville
- Mental Health Specialists, Jacksonville - Psychologist, Psychiatrist, Psychotherapist, etc
- Mexican Restaurants, Jacksonville
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- Midwives, Jacksonville
- Miscellaneous Agriculture, Jacksonville
- Miscellaneous Government, Jacksonville
- Miscellaneous Personal Services, Jacksonville
- Miscellaneous Professional, Jacksonville
- Mobile Home Parks & Communities , Jacksonville
- Mortgages & Loans, Jacksonville
- Motion Picture Pre & Post Production Services, Jacksonville
- Motor Vehicle, Jacksonville
- Museums, Jacksonville
- Music, Jacksonville
- Musical Instruments Repair, Sales & Service, Jacksonville
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