- Machine Shops
- Magazines
- Maid Service
- Major Appliance Stores
- Makeup Artists
- Management Consultants
- Manufactured Homes
- Marine Contractors
- Marine Engineers
- Marine Equipment
- Marketing Agencies
- Martial Arts Schools
- Masons
- Massage Therapists
- Mattresses
- Mechanical Contractors
- Mediation Service
- Medical Centres
- Medical Clinics
- Medical Laboratories
- Medical Supplies
- Mental Health Service
- Merchandise Warehouses
- Metal Buildings
- Metal Engravers
- Metals
- Meters
- Mexican Restaurants
- Mirrors
- Missions
- Mobile Home Dealers
- Mortgage Brokers
- Mortgages
- Motels
- Motorcycles
- Mould Removal
- Mouldings
- Moving and Storage
- Mufflers
- Multimedia
- Municipal Government
- Museums
- Music Lessons
- Mutual Funds