- Machine Shop, Johnston
- Machinery, Supplies & Equipment - Business Production Related, Johnston
- Machinery, Supplies & Equipment - Business Supplies Related, Johnston
- Machinery, Supplies & Equipment - Construction & Contractor Related, Johnston
- Manufacturers Agents & Representatives, Johnston
- Manufacturers Representative, Johnston - Reps, Independent Sales Representative, Sales Agent, etc
- Manufacturing, Johnston
- Men's Clothing Stores, Johnston - Clothes & Accessories
- Methodist Church, Johnston
- Mexican Restaurants, Johnston
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- Ministries Church, Johnston
- Miscellaneous Government, Johnston
- Miscellaneous Manufacturing, Johnston
- Miscellaneous Professional, Johnston
- Monuments, Tombstones, Markers & Memorials, Johnston
- Mortgage Bankers & Correspondents, Johnston
- Motor Vehicle, Johnston
- Motor Vehicle Rental & Leasing, Johnston
- Moving Truck Rental , Johnston
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