- Dairy Products - Wholesale & Retail, Sandwich
- Dams, Waterways, & Docks Contractors, Sandwich
- Dance Companies, Sandwich
- Day Camps, Sandwich
- Decorating & Designing Services, Sandwich
- Delicatessen Restaurants, Sandwich
- Denomination, Non-Denominational, Etcetera, Sandwich
- Dentists, Sandwich
- Direct Mail Advertising, Sandwich
- Diving Instruction, Sandwich
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- Doctors, Physicians & Surgeons, Sandwich
- Donuts, Sandwich
- Door & Gate Operating Devices, Sandwich
- Door Installation & Repair, Sandwich - Garage, Glass, Screen, Sliding, French, Closet, Front, Storm, Interior & Exterior Doors
- Doors & Door Frames, Sandwich - Exterior, Interior, French, Front Entry, Patio, Storm, Garage & Sliding Glass Doors
- Drinking Establishments, Sandwich
- Drive Shafts, Sandwich
- Dry Cleaning & Laundry, Sandwich - Dry Cleaners
- Durable & Non Durable Goods & Products, Sandwich
- Dwelling Operators Except Apartment, Sandwich
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