- Machine Shop & Tool Repair Service, Portland
- Machinery And Equipment Manufacturers, Portland
- Machinery, Supplies & Equipment - Business Production Related, Portland
- Machinery, Supplies & Equipment - Business Supplies Related, Portland
- Machinery, Supplies & Equipment - Construction & Contractor Related, Portland
- Major Appliances, Portland - Household & Kitchen
- Management Consultants & Services, Portland
- Manicurists & Pedicurists, Portland
- Manufacturers Agents & Representatives, Portland
- Manufacturers Representative, Portland - Reps, Independent Sales Representative, Sales Agent, etc
- Manufacturing, Portland
- Manufacturing Products, Portland
- Marinas & Marina Services, Portland
- Marine Products And Services, Portland
- Marine Repair & Service Stations, Portland
- Marine Supplies & Equipment, Portland - Boat Supplies
- Marine Supplies & Equipment Repair, Portland - Boat Supplies & Equipment
- Marriage & Family Counselors, Portland
- Martial Arts & Self Defense Schools, Portland
- Masonry Contractors, Portland - Stone Mason, Brick Mason - Install & Repair
- Masonry Materials & Supplies, Portland
- Massage Therapists & Professional, Portland
- Massage Therapy, Portland
- Material Handling & Heavy Machinery & Equipment, Portland
|
- Material Handling Equipment, Portland - Conveyor Belt, Pallet Jack, Forklift, etc
- Medical Supplies & Equipment, Portland
- Medical Transcription Service, Portland
- Metal Tablets, Portland
- Methodist Church, Portland
- Military Supplies, Portland
- Mini & Self Storage, Portland
- Mini Golf Courses, Portland
- Miscellaneous Manufacturing, Portland
- Miscellaneous Personal Services, Portland
- Miscellaneous Photographers, Portland
- Miscellaneous Professional, Portland
- Molds Manufacturers, Portland
- Monuments, Tombstones, Markers & Memorials, Portland
- Mortgage Bankers & Correspondents, Portland
- Motion Picture & Television Production Services, Portland
- Motion Picture Dists & Producers, Portland
- Motor Vehicle, Portland
- Motor Vehicle Rental & Leasing, Portland
- Motorcycle Parts, Accessories & Dealers, Portland
- Moving Companies, Portland
- Moving Supplies & Equipment Rental, Portland
- Moving Truck Rental , Portland
- Museums, Portland
|