- Tank & Pipe Working Industrial Equipment, Upland
- Tanning Salons, Upland
- Tattoo Covering & Removing, Upland
- Tattooing, Upland
- Tax Preparations Electronic Filings, Upland
- Tax Reporting Services, Upland
- Tax Return Preparation, Upland
- Tax Services, Upland
- Taxi Cab Service, Upland
- Taxi Service, Upland
- Telecommunications, Upland
- Telecommunications Companies, Businesses & Services, Upland
- Telecommunications Consultants, Upland
- Telecommunications Contractors, Upland
- Telephone Communication Service & Phone Companies, Upland - Local & Long Distance Telephone Service
- Telephone Equipment & Phone Systems, Upland - Sales, Service & Repair
- Telephone Equipment & Systems - Repair & Service, Upland - Telecommunication Services
- Telephone Wire & TV Cable Contractors, Upland - Phone Jack - Wiring Installation
- Television Systems - Closed Circuit Telecasting, Upland - CCTV
- Temp Agencies, Upland
- Temporary & Contractor Agencies, Upland
- Tennis Clubs, Upland
- Tennis Courts, Upland
- Tents, Canopies & Awnings, Upland
- Teriyaki Restaurants, Upland
- Terrazzo Tile Marble & Mosaic Contractors, Upland
- Testing Laboratories, Upland - Lab Tests
- Textile Machinery, Supplies & Equipment, Upland - Cutting Machine, Embroidery Machine, Sewing Supplies, etc
- Thai Restaurants, Upland
- Theater Companies & Brokers, Upland - Stage Theatres, Concert Halls, Auditoriums, Ballrooms & Venues
- Theatrical Producers & Services, Upland
- Thrift Stores, Resale & Consignment Shops, Upland
- Tile Contractors - Install & Repair, Upland - Ceramic & Porcelain Tile Flooring - Kitchen & Bathroom
- Tile Custom Design, Upland
- Tile Flooring, Upland
- Tile Supplies, Upland - Tile Stores - Companies
- Time Clocks & Recorders, Upland
- Time Recorders & Supplies, Upland - Time Cards Racks
- Tire & Related Products Manufacturers, Upland
- Tire Repair, Recapping & Retread, Upland
- Tire Retread, Regroove & Repair Equipment, Upland
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- Tires & Inner Tubes Manufacturers, Upland
- Tires - Wholesale & Retail, Upland
- Title & Surety Insurance, Upland
- Title Companies, Upland - Title Search, Service & Abstract Company
- Toner Cartridges Refurbishing Services, Upland
- Tool & Die Makers, Upland
- Tools & Hardware Supplies, Upland
- Tourist Attractions, Upland
- Tours & Guide Services, Upland
- Towing Service, Upland
- Toy Stores, Upland
- Traffic & Parking Consultants, Upland
- Trailer Rental & Leasing, Upland
- Translators & Interpreters, Upland
- Transmission Repair & Service, Upland
- Transportation, Upland
- Transportation & Distribution Management, Upland
- Transportation & Traffic Consultants & Services, Upland - Transportation Brokers & Consultants
- Transportation Equipment Manufacturers, Upland
- Transportation Expeditors, Upland
- Transportation Facilities & Services, Upland
- Transportation Inspection Services, Upland
- Transportation Rental & Leasing, Upland
- Transportation Repair & Maintenance, Upland
- Travel & Tourism, Upland
- Travel Arrangement & Services, Upland
- Tree & Shrub Transplanting & Removal, Upland
- Truck & Tractor Transmission Repair, Upland
- Truck Driving School, Upland
- Truck Refrigeration Equipment & Repair, Upland
- Truck Rental & Leasing, Upland - Rent a Truck & Tractor
- Truck Repair & Service, Upland
- Truck Trailers Parts & Dealers, Upland
- Trucking - Garbage, Refuse, Waste, Trash, Scrap & Junk Removal, Upland - Collection, Removal, Disposal, Recycling, etc
- Trust And Will Attorneys & Lawyers, Upland
- Trust And Will Lawyers & Attorneys, Upland
- Trust Companies, Upland
- Tuckpointing & Building Cleaning, Upland
- Tutoring Instructor, Upland
- Twenty Four Hour Dining Restaurants, Upland
- Typing & Word Processing Services, Upland
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