- Machinery, Supplies & Equipment - Business Supplies Related, Beaverton
- Machinery, Supplies & Equipment - Construction & Contractor Related, Beaverton
- Major Appliances, Beaverton - Household & Kitchen
- Management Consultants & Services, Beaverton
- Manicurists & Pedicurists, Beaverton
- Manufacturing, Beaverton
- Manufacturing Products, Beaverton
- Marinas & Marina Services, Beaverton
- Masonry Materials & Supplies, Beaverton
- Massage Therapists & Professional, Beaverton
- Massage Therapy, Beaverton
- Medical Supplies & Equipment, Beaverton
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- Membership Sports & Recreation Clubs, Beaverton
- Metal Specialties, Beaverton
- Metal Stampings Manufacturers, Beaverton
- Mini & Self Storage, Beaverton
- Miscellaneous Government, Beaverton
- Miscellaneous Metal Work Manufacturers, Beaverton
- Miscellaneous Personal Services, Beaverton
- Motor Vehicle, Beaverton
- Motor Vehicle Rental & Leasing, Beaverton
- Moving Companies, Beaverton
- Moving Truck Rental , Beaverton
- Museums, Beaverton
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