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Letter M - Port Jefferson, NY Business Directory
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Machinery - New & Used (1)
Managerial Services (1)
Manufacturers Agents & Representatives (1)
Marina (1)
Marine Contractors & Designers (1)
Marine Equipment & Supplies (1)
Marine Equipment & Supplies Repairing (1)
Market Research & Analysis (1)
Mastectomy Apparel, Forms, Prostheses & Supplies (1)
Mediation Services (2)
Medical Billing Services (1)
Medical Diagnostic Imaging (1)
Metals (1)
Midwives (3)
Mildew Removal & Control (1)
Mirrors (1)
Miscellaneous Personal Services, Nec (4)
Mortgage Services (4)
Mortgages Bought & Sold (1)
Motels & Hotels (5)
Motorcycles, Motor Scooters & Mini Bikes (1)
Multimedia Services & Systems (1)
Museums (1)
Museums & Art Galleries (1)