- Economic Development, Oakland
- Education, Oakland
- Educational Facilities, Oakland
- Electric Companies, Oakland
- Electric Motor Repair & Service, Oakland
- Electric Motors & Generators , Oakland
- Electrical Control Systems & Materials, Oakland
- Electrical Power Systems, Oakland
- Electrical Supplies, Parts & Equipment, Oakland - Wholesale & Manufacturers
- Electricians, Oakland - Electrical Contractors
- Electronics Repair & Maintenance , Oakland
- Electronics Stores, Oakland
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- Elementary Schools, Oakland
- Elevator & Escalators Sales, Repair & Service, Oakland
- Emergency Services, Oakland
- Employment Agencies, Oakland - Staffing Agencies
- Engine Rebuild, Repair & Exchange, Oakland
- Engineer & Architect Services, Oakland - Engineering & Architecture Service
- Engineering Consultants, Oakland - Consulting Engineers
- Entertainment & Recreation, Oakland
- Episcopal Churches, Oakland
- European Cuisine, Oakland
- Evangelical Church, Oakland
- Excavation Contractors, Oakland - Excavating - Excavator Companies
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