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1. Before 1960  (42,464)
2. 1960 To 1975  (54,075)
3. 1976 To 1991  (234,100)
4. 1992 To 2008  (642,167)
5. After 2008  (1,171,323)
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New Records 

1. New From Last Month  (54,282)
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1. Patents  (2,149,765)
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5. Conference Proceedings  (13)
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7. Thesises (postgraduate)  (9)
8. Web Resources  (9)
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11. Standards  (1)
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Subject 

1. Education  (2,150,002)
2. Physics  (2,149,794)
3. Display  (2,149,765)
4. Advertising  (2,149,765)
5. Seals  (2,149,765)
6. Displaying  (866,518)
7. Labels Or Name-Plates  (866,518)
8. Signs  (866,518)
9. Electricity  (559,545)
10. Globes  (485,205)
11. Educational Or Demonstration Appliances  (485,204)
12. Planetaria  (485,204)
13. Appliances For Teaching, Or Communicating With, The Blind,deaf Or Mute  (485,204)
14. Diagrams  (485,204)
15. Computing  (413,394)
16. Calculating  (413,393)
17. Counting  (413,393)
18. Optics  (341,457)
19. Electric Digital Data Processing  (292,941)
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Databases 

1. esp@cenet  (2,149,765)
2. ProQuest Central  (340)
3. DOAJ Directory of Open Access Journals  (190)
4. ROAD: Directory of Open Access Scholarly Resources  (170)
5. GFMER Free Medical Journals  (53)
6. Freely Accessible Journals  (38)
7. Coronavirus Research Database  (32)
8. IOP Publishing Free Content  (29)
9. arXiv.org  (28)
10. Education Resources Information Center (ERIC)  (26)
11. IOPscience (Open Access)  (25)
12. PubMed Central  (21)
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14. Ebook Central - Academic Complete  (14)
15. IEEE Open Access Journals  (12)
16. ProQuest One Psychology  (11)
17. MEDLINE  (10)
18. DTIC STINET  (9)
19. CEEOL: Open Access  (9)
20. DTIC Technical Reports  (9)
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Language 

1. English  (1,841,184)
2. Chinese  (541,355)
3. French  (230,146)
4. German  (162,288)
5. Korean  (128,455)
6. Japanese  (118,754)
7. Spanish  (23,222)
8. Russian  (17,835)
9. Portuguese  (11,798)
10. Italian  (7,307)
11. Swedish  (3,991)
12. Dutch  (3,404)
13. Finnish  (2,658)
14. Danish  (2,634)
15. Polish  (2,562)
16. Norwegian  (1,758)
17. Ukrainian  (1,684)
18. Czech  (1,372)
19. Turkish  (1,228)
20. Romanian  (673)
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Journal Title 

1. Applied Sciences  (6)
2. Arxiv  (12)
3. arXiv.org  (28)
4. Cryptologia  (7)
5. Electronics  (7)
6. Ieee Access  (10)
7. Journal Of Physics: Conference Series  (25)
8. Journal Of Physics. Conference Series  (27)
9. The Mathematics Teacher  (7)
10. Turkish Journal Of Computer And Mathematics Education  (33)
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