- Ear & Body Piercing, Ottawa
- Eastern Orthodox Church, Ottawa
- Eating Disorder Treatment & Information Centers, Ottawa
- Eaves Troughs, Ottawa
- Eckankar Church, Ottawa
- Economic Development, Ottawa
- Editing Services Motion Pictures, Ottawa
- Education, Ottawa
- Education & Information Services, Ottawa
- Education Services, Ottawa
- Educational & School Supplies & Equipment, Ottawa - Classroom & Teacher Supply Stores
- Educational Consultants, Ottawa
- Educational Consultants, Ottawa
- Educational Facilities, Ottawa
- Educational Financing, Ottawa
- Educational Scholarship Plans, Ottawa
- Educational Testing Services, Ottawa
- Educational, Philanthropic & Research Foundations, Ottawa
- Educators, Ottawa
- Elderly Companion Services, Ottawa
- Elected Government Officials, Ottawa
- Electric Companies, Ottawa
- Electric Motor Repair & Service, Ottawa
- Electric Motors & Generators , Ottawa
- Electric Razors & Shavers, Ottawa
- Electric Shavers Repair, Sales, Service & Supplies, Ottawa
- Electric Transformers, Ottawa
- Electrical Control Systems & Materials, Ottawa
- Electrical Control Systems & Materials, Ottawa
- Electrical Goods, Ottawa
- Electrical Heating Systems, Ottawa
- Electrical Representatives, Ottawa
- Electrical Supplies, Parts & Equipment, Ottawa - Wholesale & Manufacturers
- Electricians, Ottawa - Electrical Contractors
- Electrolysis Treatments, Ottawa
- Electronic & Fax Advertising, Ottawa
- Electronic & Monitoring Equipment, Ottawa
- Electronic Commerce, Ottawa
- Electronic Commerce, Ottawa - E-Commerce
- Electronic Equipment, Parts & Supplies, Ottawa
- Electronic Repair Shops , Ottawa
- Electronic Research, Design & Development, Ottawa
- Electronic Services, Ottawa
- Electronic Testing Equipment, Ottawa
- Electronic, Communications & Electrical Engineers, Ottawa
- Electronics Manufacturers, Ottawa
- Electronics Repair & Maintenance , Ottawa
- Electronics Stores, Ottawa
- Elementary Schools, Ottawa
- Elevator & Escalators Sales, Repair & Service, Ottawa
- Elevator Contractors, Ottawa
- Elevator Engineers, Ottawa
- Elevator Repair, Ottawa
- Elevators Parts & Supplies, Ottawa
- Embossing, Stamping & Engraving, Ottawa
- Embroidery, Ottawa
- Embroidery & Needlework Materials & Supplies Retail, Ottawa
- Emergency Services, Ottawa
- Emergency Victim Services, Ottawa
- Emissions Testing, Ottawa - Smog Check
- Employee Benefit & Compensation Plans, Ottawa
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- Employee Counseling Services, Ottawa
- Employment & Recruiting Consultants, Ottawa - Executive Search Consultants
- Employment & Recruiting Services, Ottawa
- Employment Agencies, Ottawa - Staffing Agencies
- Employment Agencies General Labor, Ottawa
- Employment And Labor Relations Attorneys & Lawyers, Ottawa
- Employment Assistance, Ottawa
- Employment Services, Ottawa
- Employment Staff Leasing, Ottawa
- Endodontists, Ottawa - Root Canal Specialist
- Energy & Conservation Agencies, Ottawa
- Energy Conservation Consultants, Ottawa
- Energy Equipment Systems & Supplies, Ottawa
- Energy Services, Ottawa
- Engine Rebuild, Repair & Exchange, Ottawa
- Engineer & Architect Services, Ottawa - Engineering & Architecture Service
- Engineering Consultants, Ottawa - Consulting Engineers
- Engineering Equipment & Supplies, Ottawa
- Engineers Nuclear, Ottawa
- Engineers Utilities & Power, Ottawa
- Engines & Transportation Related Equipment, Ottawa
- Entertainers & Entertainment Groups, Ottawa
- Entertainers & Groups, Ottawa
- Entertainment & Recreation, Ottawa
- Entertainment Agencies & Bureaus, Ottawa
- Entertainment Consultants, Ottawa
- Entertainment Services, Ottawa
- Envelopes, Paper & Stationery, Ottawa - Office Supplies
- Environmental Attorneys & Lawyers, Ottawa
- Environmental Attorneys & Lawyers, Ottawa
- Environmental Consultants, Ottawa - Ecological Consulting
- Environmental Engineers, Ottawa
- Environmental Groups, Ottawa
- Environmental Lawyers & Attorneys, Ottawa
- Environmental Products, Ottawa
- Environmental Products & Services, Ottawa
- Environmental Services, Ottawa
- Environmental Services Water Treatment Services, Ottawa
- Equipment Installation Contractors, Ottawa
- Estate And Property Attorneys & Lawyers, Ottawa
- Estate And Property Attorneys & Lawyers, Ottawa
- Estate And Property Lawyers & Attorneys, Ottawa
- Ethiopian Restaurants, Ottawa
- Ethnic Churches, Ottawa
- Ethnic Food Stores, Ottawa
- Ethnic Goods & Products Stores, Ottawa
- Ethnic Restaurants, Ottawa
- Etiquette & Modeling Schools, Ottawa
- European Cuisine, Ottawa
- Evangelical Church, Ottawa
- Event Management, Ottawa
- Event Management, Ottawa
- Excavation Contractors, Ottawa - Excavating - Excavator Companies
- Excavation Equipment, Ottawa - Excavating & Ditching Equipment
- Executive Suites & Offices For Rent, Ottawa
- Exercise Equipment Stores, Ottawa - Fitness & Gym Equipment
- Expertise & Technical Analysis, Ottawa
- Export Services, Ottawa
- Exporters, Ottawa
- Exposition Stands Designers & Manufacturers, Ottawa
- Exterior Design & Decorator Services, Ottawa
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