- TEC 000: Belonging to the Subject; not further Classified
- TEC 001: Technology, Engineering in General (Technological Progress, Aligned Technology, High Technology, ...)
- TEC 020: Interdisciplinary Technologies, Systems Engineering
- TEC 050: History of Technology; Industrial Archaeology
- TEC 100: Technical Professions
- TEC 110: Engineers
- TEC 120: Inventors
- TEC 130: Technicians
- TEC 140: CraftsmenCrafts in general and some disciplines see IND
- TEC 190: Other
- TEC 110: Engineers
- TEC 200: Engineering Education; Engineering Pedagogics; Engineering in Schools
- TEC 300: Technical Associations; Technical Organizations; Technical Societies (e.g. VDI: Association of German Engineers); Institutions and Companies in General.; Occupation Cooperatives; Chamber of Industry and Commerce
- TEC 320: Technical Research; Industrial Research (Research and Development)
- TEC 400: Standards System; Technical Rules
- TEC 500: Patent System
- TEC 600: Technical Drawing; Graphical Symbols; Pictographs (unless Listed under Relevant Subject)
- TEC 620: Constructing; Product Development in EngineeringDevelopment and Construction; Simultaneous Engineering (in Mechanical Engineering) see MAS 030
- TEC 680: Modelling Technology; Theory of Similarity (Theory of Analogy)
- TEC 700: Technical Reliability; Reliability TheoryReliability in Construction Engineering see BAU 308
- TEC 750: Technical Inspection (TÜV: Technical Supervisory Association); Trade ControlRoadworthiness Control of Motor Vehicles see VER 139
- TEC 770: Safety Engineering (Safety at Work); Occupational Health and Safety; Hazardous Substances; Transportation of Hazardous Materials; Explosion Prevention; Equipment Safety
- TEC 780: Damage Prevention; Damage Analysis
- TEC 790: Accidents in General; Accident Prevention; Protective EquipmentAccident; Work Safety: Aspects of Vocational and Occupational Psychology see PSY 640
- TEC 780: Damage Prevention; Damage Analysis
- TEC 800: Disaster Management; Air-Raid Protection; Civil Defence
- TEC 850: Technical Advisory Services; Business Consulting Services; Experts; Engineering Firms (Consultant Engineers)
- TEC 900: Ergonomics; Work Humanization; Work DesignSociological Aspects of Work see SOZ 310