- Machine Shop, Haliburton
- Machinery, Supplies & Equipment - Business Production Related, Haliburton
- Machinery, Supplies & Equipment - Business Supplies Related, Haliburton
- Machinery, Supplies & Equipment - Construction & Contractor Related, Haliburton
- Mailing, Delivery & Courier Service, Haliburton
- Major Appliances, Haliburton - Household & Kitchen
- Management Consultants & Services, Haliburton
- Manufacturing, Haliburton
- Manufacturing Products, Haliburton
- Martial Arts & Self Defense Schools, Haliburton
- Masonry Materials & Supplies, Haliburton
- Massage Therapists & Professional, Haliburton
- Massage Therapy, Haliburton
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- Medical Supplies & Equipment, Haliburton
- Midwives, Haliburton
- Mini & Self Storage, Haliburton
- Miscellaneous Government, Haliburton
- Miscellaneous Industry, Haliburton
- Miscellaneous Professional, Haliburton
- Monuments, Tombstones, Markers & Memorials, Haliburton
- Mortgage Bankers & Correspondents, Haliburton
- Mortgage Brokers, Haliburton
- Motor Vehicle, Haliburton
- Motor Vehicle Rental & Leasing, Haliburton
- Music, Haliburton
- Musical Instruments & Equipment Stores, Haliburton
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