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Creation Date 

1. Before 1960  (51,477)
2. 1960 To 1962  (99,937)
3. 1963 To 1965  (137,748)
4. 1966 To 1969  (290,201)
5. After 1969  (343,647)
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Resource Type 

1. Articles  (894,265)
2. Reviews  (3,177)
3. Web Resources  (1,209)
4. Videos  (949)
5. Reports  (117)
6. Images  (107)
7. magazinearticle  (90)
8. Text Resources  (10)
9. Government Documents  (5)
10. Books  (4)
11. Thesises (postgraduate)  (4)
12. Datasets  (1)
13. Drawing/Maps  (1)
14. Conference Proceedings  (1)
15. Audio  (1)
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Subject 

1. Science & Technology  (896,995)
2. Life Sciences & Biomedicine  (498,134)
3. Physical Sciences  (294,625)
4. Humans  (185,455)
5. Chemistry  (158,156)
6. Animals  (149,175)
7. Old Medline  (113,808)
8. General & Internal Medicine  (93,141)
9. Medicine, General & Internal  (93,067)
10. Technology  (83,843)
11. Biochemistry & Molecular Biology  (80,323)
12. Male  (78,319)
13. Science & Technology - Other Topics  (77,776)
14. Multidisciplinary Sciences  (77,153)
15. Female  (76,963)
16. Physics  (70,066)
17. Chemistry, Multidisciplinary  (54,635)
18. Rats  (41,859)
19. Mathematics  (39,760)
20. Adult  (37,980)
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Databases 

1. MEDLINE  (412,818)
2. ProQuest Central  (230,070)
3. PubMed Central  (145,263)
4. GFMER Free Medical Journals  (137,598)
5. HighWire Press (Free Journals)  (124,123)
6. ProQuest One Psychology  (64,063)
7. DOAJ Directory of Open Access Journals  (42,206)
8. Wiley-Blackwell Open Access Titles  (32,465)
9. JSTOR Early Journal Content  (15,059)
10. ROAD: Directory of Open Access Scholarly Resources  (14,424)
11. Wiley-Blackwell AGU Digital Library  (10,956)
12. IngentaConnect Free/Open Access Journals  (9,039)
13. Project Euclid Open Access  (7,554)
14. Chemical Society of Japan Free  (6,678)
15. IOP Publishing Free Content  (6,386)
16. Oxford Journals Open Access Collection  (6,313)
17. Freely Accessible Journals  (5,974)
18. Digital Library of the Commons  (5,256)
19. American Mathematical Society Publications (Freely Accessible)  (4,802)
20. Freely Accessible Japanese Titles  (3,256)
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Language 

1. English  (897,345)
2. Japanese  (80,136)
3. German  (4,107)
4. Hungarian  (1,380)
5. French  (1,182)
6. Dutch  (401)
7. Swedish  (162)
8. Norwegian  (123)
9. Romanian  (92)
10. Italian  (90)
11. Russian  (67)
12. Spanish  (60)
13. Slovenian  (43)
14. Czech  (33)
15. Portuguese  (7)
16. Danish  (6)
17. Latin  (5)
18. Chinese  (4)
19. Polish  (3)
20. Irish  (2)
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Journal Title 

1. Analytical Chemistry  (8,728)
2. Biochimica Et Biophysica Acta  (14,978)
3. Bmj  (33,175)
4. British Medical Journal  (33,200)
5. Journal Of Geophysical Research  (9,072)
6. Journal Of The American Chemical Society  (13,283)
7. Nature  (43,597)
8. The Journal Of Biological Chemistry  (8,799)
9. The Lancet  (19,456)
10. The New England Journal Of Medicine  (13,137)
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