- Dance Companies, Havertown
- Data Communications Service, Equipment, Supplies & Sales, Havertown
- Delicatessen Restaurants, Havertown
- Dental Bonding & Cosmetic Dentistry, Havertown - Cosmetic Dentist & Tooth Bonding
- Dentists, Havertown
- Department Stores, Havertown
- Dermatologists, Havertown - Skin Doctors, Physicians & Surgeons (Dermatology)
- Developmental Disabilities, Havertown
- Developmentally Disabled Information & Services, Havertown
- Diesel Engine Repair & Service, Havertown
- Digital Printing & Imaging Service, Havertown
- Diner Restaurants, Havertown
- Direct Mail Advertising Services, Havertown
- Direct Marketing, Havertown
- Disc Jockeys, Havertown
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- Discount Stores, Havertown - Clothing, Grocery, Furniture, Etc
- Dishwashers Sales, Service & Repair, Havertown
- Displays & Display Installation Service, Havertown - Trade Show Displays
- Divorce & Family Law Attorneys & Lawyers, Havertown
- Doctors, Physicians & Surgeons, Havertown
- Donuts, Havertown
- Door & Gate Operating Devices, Havertown
- Door Glass & Mirrors, Havertown
- Doors & Door Frames, Havertown - Exterior, Interior, French, Front Entry, Patio, Storm, Garage & Sliding Glass Doors
- Dressmakers Supplies, Havertown
- Drinking Establishments, Havertown
- Drugs, Pharmaceutical Products & Toiletries - Wholesale & Manufacturers, Havertown
- Dry Cleaning & Laundry, Havertown - Dry Cleaners
- Drywall, Insulation & Plaster Contractors, Havertown - Installation & Repair Services
- Dwelling Operators Except Apartment, Havertown
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