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Creation Date 

1. Before 1960  (630)
2. 1960 To 1975  (7,799)
3. 1976 To 1991  (24,825)
4. 1992 To 2008  (30,025)
5. After 2008  (42,521)
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New Records 

1. New From Last Month  (1,671)
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Subject 

1. Systems For Regulating Electric Or Magnetic Variables  (73,230)
2. Control Or Regulation Thereof  (46,746)
3. Conversion Of Dc Or Ac Input Power Into Surge Outputpower  (46,746)
4. Circuit Arrangements Or Systems For Supplying Or Distributingelectric Power  (33,219)
5. Systems For Storing Electric Energy  (33,219)
6. Systems For Controlling Or Regulating Non-Electric Variables  (30,300)
7. Controlling Transformers, Reactors Or Choke Coils  (20,180)
8. Control Or Regulation Of Electric Motors, Electric Generatorsor Dynamo-Electric Converters  (20,180)
9. Emergency Protective Circuit Arrangements  (11,848)
10. Control Or Regulating Systems In General  (10,237)
11. Functional Elements Of Such Systems  (10,237)
12. Monitoring Or Testing Arrangements For Such Systems Orelements  (10,237)
13. Transporting  (9,861)
14. Performing Operations  (9,861)
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Language 

1. English  (92,288)
2. Chinese  (14,669)
3. French  (11,454)
4. German  (11,441)
5. Korean  (3,298)
6. Japanese  (2,663)
7. Spanish  (982)
8. Russian  (831)
9. Portuguese  (551)
10. Italian  (530)
11. Swedish  (479)
12. Dutch  (262)
13. Polish  (245)
14. Finnish  (236)
15. Danish  (206)
16. Norwegian  (144)
17. Ukrainian  (85)
18. Czech  (61)
19. Romanian  (58)
20. Bulgarian  (34)
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