- Machinery, Supplies & Equipment - Business Supplies Related, Oakland
- Machinery, Supplies & Equipment - Construction & Contractor Related, Oakland
- Major Appliances, Oakland - Household & Kitchen
- Management Consultants & Services, Oakland
- Manufacturing, Oakland
- Meat Packers, Oakland
- Methodist Church, Oakland
- Mexican Restaurants, Oakland
- Millwrights, Oakland
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- Miscellaneous Business Services, Oakland
- Miscellaneous Government, Oakland
- Miscellaneous Personal Services, Oakland
- Monuments, Tombstones, Markers & Memorials, Oakland
- Mortgage Bankers & Correspondents, Oakland
- Mortgage Contracts & Services, Oakland
- Motor Vehicle, Oakland
- Muffler Shop & Exhaust Systems, Oakland
- Museums, Oakland
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