- Machine Shops
- Machine Tools
- Major Appliance Stores
- Makeup Artists
- Management Consultants
- Marine Contractors
- Marketing Agencies
- Martial Arts Schools
- Masons
- Massage Therapists
- Mastectomy Products
- Mats
- Mattresses
- Meat Packers
- Mechanical Contractors
- Medical Alarm Systems
- Medical Centres
- Medical Clinics
- Medical Supplies
- Mental Health Service
- Metal Buildings
- Metal Finishers
- Metal Heat Treating
- Metal Stamping
- Metals
- Mexican Restaurants
- Middle Eastern Restaurants
- Mirrors
- Missions
- Mobile Home Dealers
- Money Transfers
- Mortgage Brokers
- Mortgages
- Motels
- Motorcycle Parts
- Motorcycles
- Mould Makers
- Mould Removal
- Mouldings
- Moving and Storage
- Mufflers
- Multimedia
- Municipal Government
- Music Lessons
- Musical Instrument Stores
- Mutual Funds