- Machine Shop & Tool Repair Service, River Grove
- Machinery, Supplies & Equipment - Business Production Related, River Grove
- Machinery, Supplies & Equipment - Construction & Contractor Related, River Grove
- Mailing, Delivery & Courier Service, River Grove
- Major Appliances, River Grove - Household & Kitchen
- Management Consultants & Services, River Grove
- Manicurists & Pedicurists, River Grove
- Manufacturing, River Grove
- Manufacturing Products, River Grove
- Maytag Appliances, River Grove
- Membership Sports & Recreation Clubs, River Grove
- Mental & Developmental Information & Referral Services, River Grove
- Metal Finishers, River Grove
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- Metal Plating & Polishing, River Grove
- Mini & Self Storage, River Grove
- Mining, River Grove
- Miscellaneous Household Item Repair, River Grove
- Miscellaneous Business Services, River Grove
- Miscellaneous Government, River Grove
- Miscellaneous Personal Services, River Grove
- Miscellaneous Professional, River Grove
- Mortgages & Loans, River Grove
- Motor Vehicle, River Grove
- Mulch, Peat & Moss Products, River Grove
- Museums, River Grove
- Musical Instruments Repair, Sales & Service, River Grove
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