- Education, Derry
- Education & Information Services, Derry
- Educators, Derry
- Electric Motors & Generators , Derry
- Electrical Control Systems & Materials, Derry
- Electrical Supplies, Parts & Equipment, Derry - Wholesale & Manufacturers
- Electricians, Derry - Electrical Contractors
- Electrolysis Treatments, Derry
- Electronics Manufacturers, Derry
- Electronics Stores, Derry
- Elementary Schools, Derry
- Embroidery Machine, Derry
- Emergency Services, Derry
- Emergency Victim Services, Derry
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- Employment Agencies, Derry - Staffing Agencies
- Engine Parts & Equipment, Derry
- Engineer & Architect Services, Derry - Engineering & Architecture Service
- Engineering Consultants, Derry - Consulting Engineers
- Engineers Forensic, Derry
- Entertainment & Recreation, Derry
- Entertainment Consultants, Derry
- Entertainment Services, Derry
- Environmental Consultants, Derry - Ecological Consulting
- Environmental Products, Derry
- Environmental Products & Services, Derry
- European Cuisine, Derry
- Excavation Contractors, Derry - Excavating - Excavator Companies
- Exterior Design & Decorator Services, Derry
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