- Machine Shop, Didsbury
- Machine Shop & Tool Repair Service, Didsbury
- Machinery, Supplies & Equipment - Business Production Related, Didsbury
- Machinery, Supplies & Equipment - Construction & Contractor Related, Didsbury
- Management Consultants & Services, Didsbury
- Manufacturers Agents & Representatives, Didsbury
- Manufacturers Representative, Didsbury - Reps, Independent Sales Representative, Sales Agent, etc
- Manufacturing, Didsbury
- Masonry Materials & Supplies, Didsbury
- Massage Therapists & Professional, Didsbury
- Massage Therapy, Didsbury
- Meat Packers, Didsbury
- Mechanical Contractors, Didsbury - Install, Service & Repair
- Medical Supplies & Equipment, Didsbury
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- Mennonite Church, Didsbury
- Mental Health Clinics, Didsbury - Treatment Centers
- Mental Health Specialists, Didsbury - Psychologist, Psychiatrist, Psychotherapist, etc
- Mini & Self Storage, Didsbury
- Mining, Didsbury
- Miscellaneous Business Services, Didsbury
- Miscellaneous Manufacturing, Didsbury
- Mission Churches, Didsbury
- Motor Vehicle, Didsbury
- Motor Vehicle Rental & Leasing, Didsbury
- Moving Truck Rental , Didsbury
- Museums, Didsbury
- Music Schools, Didsbury
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