- Tar
- Technologies (list by group)
- Technology (def)
- Technology (home)
- Technology Measures
- Telegraphy,Telegraph
- Telephony,Telephone
- Television and Radio
- Textile Manufacture
- Textiles, Clothing, and Footwear Manufacture
- Thermodynamics
- Thermometer
- TIFF (Tagged Image File Format) (def)
- Time Measurement
- Tobacco
- Tolerances (and Precision & Accuracy)
- Tools, Hand and Machine
- Tools, Hand
- Tools, Machine
- Transportation, Handling, and Storage
- Turbine, Gas
- Turbine, Water
- Turbines and Engines, Steam
- Typewriters and Printers
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