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Creation Date 

1. Before 1983  (11)
2. 1983 To 1984  (10)
3. 1985 To 1986  (4)
4. 1987 To 1989  (19)
5. After 1989  (10)
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Subject 

1. Chemistry  (24)
2. Metallurgy  (24)
3. Measuring  (22)
4. Testing  (22)
5. Physics  (22)
6. Investigating Or Analysing Materials By Determining Theirchemical Or Physical Properties  (21)
7. Treatment Of Water, Waste Water, Sewage, Or Sludge  (16)
8. Transporting  (8)
9. Performing Operations  (8)
10. Technical Subjects Covered By Former Uspc Cross-Reference Art Collections [xracs] And Digests  (6)
11. General Tagging Of Cross-Sectional Technologies Spanning Over Several Sections Of The Ipc  (6)
12. General Tagging Of New Technological Developments  (6)
13. Lighting  (5)
14. Weapons  (5)
15. Technologies Or Applications For Mitigation Or Adaptation Againstclimate Change  (5)
16. Blasting  (5)
17. Separation  (5)
18. Heating  (5)
19. Mechanical Engineering  (5)
20. Physical Or Chemical Processes Or Apparatus In General  (5)
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Language 

1. English  (52)
2. French  (14)
3. German  (8)
4. Spanish  (1)
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