- Machine Shop & Tool Repair Service, Oakville
- Machinery, Supplies & Equipment - Business Production Related, Oakville
- Management Consultants & Services, Oakville
- Manicurists & Pedicurists, Oakville
- Manufacturing, Oakville
- Manufacturing Products, Oakville
- Meat Market, Wholesale & Products, Oakville
- Metal Working Machinery, Oakville
- Microwave Oven Repair & Service, Oakville
- Miscellaneous Business Services, Oakville
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- Miscellaneous Government, Oakville
- Miscellaneous Personal Services, Oakville
- Miscellaneous Professional, Oakville
- Motor Vehicle, Oakville
- Motorcycle Parts, Accessories & Dealers, Oakville
- Movie Theaters, Oakville
- Music, Oakville
- Music Lessons, Oakville
- Music Lessons - Instrumental, Oakville
- Musical Instruments & Equipment Stores, Oakville
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