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Subclass T
| T1-995 | Technology (General) | |||
| T10.5-11.9 | Communication of technical information | |||
| T11.95-12.5 | Industrial directories | |||
| T55-55.3 | Industrial safety. Industrial accident prevention | |||
| T55.4-60.8 | Industrial engineering. Management engineering | |||
| T57-57.97 | Applied mathematics. Quantitative methods | |||
| T57.6-57.97 | Operations research. Systems analysis | |||
| T58.4 | Managerial control systems | |||
| T58.5-58.64 | Information technology | |||
| T58.6-58.62 | Management information systems | |||
| T58.7-58.8 | Production capacity. Manufacturing capacity | |||
| T59-59.2 | Standardization | |||
| T59.5 | Automation | |||
| T59.7-59.77 | Human engineering in industry. Man-machine systems | |||
| T60-60.8 | Work measurement. Methods engineering | |||
| T61-173 | Technical education. Technical schools | |||
| T173.2-174.5 | Technological change | |||
| T175-178 | Industrial research. Research and development | |||
| T201-342 | Patents. Trademarks | |||
| T351-385 | Mechanical drawing. Engineering graphics | |||
| T391-995 | Exhibitions. Trade shows. World's fairs | |||
