- Machine Shop & Tool Repair Service, Parsippany
- Machinery, Supplies & Equipment - Business Production Related, Parsippany
- Machinery, Supplies & Equipment - Business Supplies Related, Parsippany
- Machinery, Supplies & Equipment - Construction & Contractor Related, Parsippany
- Mailing, Delivery & Courier Service, Parsippany
- Major Appliance Repair & Service, Parsippany
- Major Appliances, Parsippany - Household & Kitchen
- Malls & Shopping Centers, Parsippany
- Malpractice Attorneys & Lawyers, Parsippany
- Management Consultants & Services, Parsippany
- Manicurists & Pedicurists, Parsippany
- Manifold Business Forms Manufacturers, Parsippany
- Manufacturers Agents & Representatives, Parsippany
- Manufacturers Representative, Parsippany - Reps, Independent Sales Representative, Sales Agent, etc
- Manufacturing, Parsippany
- Manufacturing Products, Parsippany
- Marble, Parsippany
- Market Research & Analysis , Parsippany - Market Analysis, Business & Economic Research
- Marketing Consultants Professional Practices, Parsippany
- Marriage & Family Counselors, Parsippany
- Marriage & Family Counselors Information & Referrals, Parsippany
- Martial Arts & Self Defense Schools, Parsippany
- Masonry Contractors, Parsippany - Stone Mason, Brick Mason - Install & Repair
- Masonry Materials & Supplies, Parsippany
- Masonry Panels Prefabricated, Parsippany
- Massage Therapists & Professional, Parsippany
- Massage Therapy, Parsippany
- Material Handling & Heavy Machinery & Equipment, Parsippany
- Mechanical Contractors, Parsippany - Install, Service & Repair
- Mechanical Engineer, Parsippany - Mechanical Engineering Service
- Medical & Dental Management, Parsippany
- Medical & Health Service Organizations, Parsippany
- Medical & Infectious Waste Disposal, Parsippany
- Medical Alert Systems, Parsippany - Medical Alarms - PERS
- Medical Diagnostic Clinics, Parsippany - Clinical Labs & Centers
- Medical Equipment Manufacturers, Parsippany
- Medical Groups & Clinics, Parsippany - Medical & Health Centers
- Medical Research, Parsippany
- Medical Research & Development, Parsippany - Medical Information & Research
- Medical Supplies & Equipment, Parsippany
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- Medical Transcription Service, Parsippany
- Membership Sports & Recreation Clubs, Parsippany
- Mental Health Specialists, Parsippany - Psychologist, Psychiatrist, Psychotherapist, etc
- Messenger Service, Parsippany - Message Receiving & Forwarding Service
- Metal Products, Parsippany
- Metal Specialties, Parsippany
- Metal Working Machinery, Parsippany
- Methodist Church, Parsippany
- Mexican Restaurants, Parsippany
- Middle Eastern Restaurants, Parsippany
- Mill Supplies & Equipment, Parsippany - Milling Machines
- Minerals, Parsippany
- Mini & Self Storage, Parsippany
- Miscellaneous Business Product Repair, Parsippany
- Miscellaneous Household Item Repair, Parsippany
- Miscellaneous Agriculture, Parsippany
- Miscellaneous Business Services, Parsippany
- Miscellaneous Government, Parsippany
- Miscellaneous Manufacturing, Parsippany
- Miscellaneous Personal Services, Parsippany
- Miscellaneous Professional, Parsippany
- Mobile Home Contractors, Parsippany
- Mobile Home Improvements & Repairs, Parsippany
- Money Counting & Wrapping, Parsippany
- Mortgage Bankers & Correspondents, Parsippany
- Mortgages & Loans, Parsippany
- Motion Picture Special Effects, Parsippany
- Motivational & Self Improvement Schools, Parsippany
- Motor Vehicle, Parsippany
- Motor Vehicle Rental & Leasing, Parsippany
- Motorcycle Parts, Accessories & Dealers, Parsippany
- Movie Theaters, Parsippany
- Moving & Storage Supplies & Equipment, Parsippany
- Moving Companies, Parsippany
- Moving Supplies & Equipment Rental, Parsippany
- Moving Truck Rental , Parsippany
- Muffler Shop & Exhaust Systems, Parsippany
- Multimedia Publishers, Parsippany - Multimedia Services & Systems
- Museums, Parsippany
- Music, Parsippany
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