- Machine Shop, Springfield
- Machine Shop & Tool Repair Service, Springfield
- Machine Shop Rotary Surface Grinding, Springfield - Tool Grinding & Sharpening
- Machine Shops Experimental, Springfield
- Machine Tool Attachments & Accessories, Springfield
- Machinery And Equipment Manufacturers, Springfield
- Machinery Custom Design Manufacturers, Springfield
- Machinery Repair & Rebuild, Springfield
- Machinery, Supplies & Equipment - Business Production Related, Springfield
- Machinery, Supplies & Equipment - Business Supplies Related, Springfield
- Machinery, Supplies & Equipment - Construction & Contractor Related, Springfield
- Magazine & Newspaper Stands, Springfield - Dealers & Distributors
- Mail Boxes Manufacturers, Springfield
- Mailing, Delivery & Courier Service, Springfield
- Maintenance, Cleaning & Sanitation, Springfield
- Major Appliances, Springfield - Household & Kitchen
- Make Up & Cosmetics Application, Springfield
- Malls & Shopping Centers, Springfield
- Mammography Clinics, Springfield - Breast Cancer Screening
- Management Consultants & Services, Springfield
- Manicurists & Pedicurists, Springfield
- Manufacturers Agents & Representatives, Springfield
- Manufacturers Representative, Springfield - Reps, Independent Sales Representative, Sales Agent, etc
- Manufacturing, Springfield
- Manufacturing Products, Springfield
- Manufacturing Services, Springfield
- Marble, Springfield
- Marine Supplies & Equipment, Springfield - Boat Supplies
- Marriage & Family Counselors, Springfield
- Martial Arts & Self Defense Schools, Springfield
- Masonry Contractors, Springfield - Stone Mason, Brick Mason - Install & Repair
- Masonry Materials & Supplies, Springfield
- Massage Therapists & Professional, Springfield
- Massage Therapy, Springfield
- Material Handling & Heavy Machinery & Equipment, Springfield
- Material Handling Equipment, Springfield - Conveyor Belt, Pallet Jack, Forklift, etc
- Mats & Matting, Springfield
- Maytag Appliances, Springfield
- Meat Market, Wholesale & Products, Springfield
- Mechanical Contractors, Springfield - Install, Service & Repair
- Medical & Dental Assistant Schools, Springfield
- Medical & Health Service Organizations, Springfield
- Medical Alert Systems, Springfield - Medical Alarms - PERS
- Medical Diagnostic Clinics, Springfield - Clinical Labs & Centers
- Medical Examiner, Springfield - Doctors, Physicians & Surgeons
- Medical Groups & Clinics, Springfield - Medical & Health Centers
- Medical Supplies & Equipment, Springfield
- Membership Sports & Recreation Clubs, Springfield
- Men's Clothing Stores, Springfield - Clothes & Accessories
- Mental & Developmental Information & Referral Services, Springfield
- Mental Health Clinics, Springfield - Treatment Centers
- Mental Health Specialists, Springfield - Psychologist, Psychiatrist, Psychotherapist, etc
- Merchandise Sales Events, Springfield
- Metal Boxes & Containers, Springfield
- Metal Coating & Allied Services, Springfield
- Metal Detecting Equipment, Springfield
- Metal Finishing Equipment & Supplies, Springfield
- Metal Heat Treating, Springfield
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- Metal Plating & Polishing, Springfield
- Metal Stampings Manufacturers, Springfield
- Metal Working Machinery, Springfield
- Metals, Springfield
- Metaphysical Churches, Springfield
- Methodist Church, Springfield
- Mexican Food & Goods Products, Springfield
- Mexican Restaurants, Springfield
- Midwives, Springfield
- Mildew Removal & Control, Springfield - Mold Removal
- Mini & Self Storage, Springfield
- Mining, Springfield
- Miscellaneous Household Item Repair, Springfield
- Miscellaneous Business Services, Springfield
- Miscellaneous Commercial & Industrial Supplies & Equipment Rental & Leasing, Springfield
- Miscellaneous Government, Springfield
- Miscellaneous Industry, Springfield
- Miscellaneous Jewelry, Springfield
- Miscellaneous Manufacturing, Springfield
- Miscellaneous Metal Work Manufacturers, Springfield
- Miscellaneous Personal Services, Springfield
- Miscellaneous Photographers, Springfield
- Miscellaneous Professional, Springfield
- Mission Churches, Springfield
- Mobile Home Parks & Communities , Springfield
- Mobile Restaurants, Springfield
- Money Transfer Service, Springfield
- Monuments, Tombstones, Markers & Memorials, Springfield
- Mortgage Bankers & Correspondents, Springfield
- Mortgages & Loans, Springfield
- Mosques, Springfield
- Motion Picture & Television Production Services, Springfield
- Motion Picture Dists & Producers, Springfield
- Motion Picture Pre & Post Production Services, Springfield
- Motor Vehicle, Springfield
- Motor Vehicle Rental & Leasing, Springfield
- Motorcycle & Motor Scooters Dealers, Repair & Service, Springfield
- Motorcycle Parts, Accessories & Dealers, Springfield
- Motorcycle Repair & Service, Springfield
- Movie Theaters, Springfield
- Moving & Storage Supplies & Equipment, Springfield
- Moving Companies, Springfield
- Moving Truck Rental , Springfield
- Muffler Shop & Exhaust Systems, Springfield
- Multimedia Publishers, Springfield - Multimedia Services & Systems
- Museums, Springfield
- Music, Springfield
- Music Entertainment, Springfield
- Music Lessons, Springfield
- Music Lessons - Instrumental, Springfield
- Music Lessons - Vocal, Springfield
- Music Production Services, Springfield
- Music Schools, Springfield
- Musical Instruments & Equipment Stores, Springfield
- Musical Instruments Repair, Sales & Service, Springfield
- Musical Recording Services, Springfield
- Musicians, Bands & Disc Jockeys, Springfield
- Muslim Church, Springfield
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