- Tank & Pipe Working Industrial Equipment, Pittsford
- Tax Return Preparation, Pittsford
- Tax Services, Pittsford
- Technological Research & Development, Pittsford
- Telecommunications, Pittsford
- Telecommunications Companies, Businesses & Services, Pittsford
- Telecommunications Consultants, Pittsford
- Telephone Answering Service, Pittsford - Messenger Services
- Telephone Equipment & Phone Systems, Pittsford - Sales, Service & Repair
- Tennis Courts, Pittsford
- Textile Manufacturers, Pittsford
- Theatrical Producers & Services, Pittsford
- Therapeutic Massage Clinics, Pittsford - Massage Therapy Centers
- Thrift Stores, Resale & Consignment Shops, Pittsford
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- Title & Surety Insurance, Pittsford
- Tools & Hardware Supplies, Pittsford
- Tourist Attractions, Pittsford
- Tours & Guide Services, Pittsford
- Traffic Ticket Attorneys & Lawyers, Pittsford - Traffic Violation
- Translators & Interpreters, Pittsford
- Transportation, Pittsford
- Transportation Rental & Leasing, Pittsford
- Travel & Tourism, Pittsford
- Travel Arrangement & Services, Pittsford
- Trust Companies, Pittsford
- Tunneling Contractors, Pittsford
- Tutoring Instructor, Pittsford
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