- Ear & Body Piercing, Frostburg
- Education, Frostburg
- Educational & School Supplies & Equipment, Frostburg - Classroom & Teacher Supply Stores
- Electric Companies, Frostburg
- Electric Relays, Frostburg
- Electrical Supplies, Parts & Equipment, Frostburg - Wholesale & Manufacturers
- Electricians, Frostburg - Electrical Contractors
- Electronics Stores, Frostburg
- Elementary Schools, Frostburg
- Embroidery, Frostburg
- Emergency Services, Frostburg
- Emergency Victim Services, Frostburg
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- Employment Agencies, Frostburg - Staffing Agencies
- Energy & Conservation Agencies, Frostburg
- Energy Brokers, Frostburg
- Energy Services, Frostburg
- Engine Parts & Equipment, Frostburg
- Engineer & Architect Services, Frostburg - Engineering & Architecture Service
- Engineering Consultants, Frostburg - Consulting Engineers
- Entertainment & Recreation, Frostburg
- Environmental Contractors, Frostburg - Environmental Companies
- Episcopal Churches, Frostburg
- European Cuisine, Frostburg
- Excavation Contractors, Frostburg - Excavating - Excavator Companies
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