| 1 | AAS Science | 01 | science.org |
| 2 | ACM Digital Library | 158 | dl.acm.org |
| 3 | American Chemical Society Journals | 90 | pubs.acs.org |
| 4 | American Institute of Aeronautics and Astronautics Journals | 08 | aiaa.org |
| 5 | American Institute of Physics Journals | 28 | pubs.aip.org |
| 6 | American Mathematical Society Journals | 09 | ams.org |
| 7 | American Physical Society | 17 | aps.org |
| 8 | American Society for Microbiology Journals | 16 | journals.asm.org |
| 9 | Annual Reviews Journals | 51 | annualreviews.org |
| 10 | ASCE Journals Online (Civil Engineering) | 36 | ascelibrary.org |
| 11 | ASME Journals Online | 38 | asme.org |
| 12 | Bentham Science Journals | 118 | benthamscience.com |
| 13 | BMJ Journals | 36 | journals.bmj.com |
| 14 | Cambridge University Press Journals | 441 | cambridge.org |
| 15 | Cold Spring Harbor Laboratory Press Journals | 08 | cshlpress.com |
| 16 | Elsevier Science Direct Journals | 2389 | sciencedirect.com |
| 17 | Emerald Publishing Journals | 311 | emerald.com |
| 18 | ICE Publishing Journals | 34 | icevirtuallibrary.com |
| 19 | IEEE Journals | 210 | ieee.org |
| 20 | Indian Journals.com | 258 | indianjournals.com |
| 21 | Institute of Physics Journals | 90 | iop.org |
| 22 | Lippincott Williams & Wilkins (Wolters Kluwer) | 305 | ovid.com |
| 23 | Oxford University Press Journals | 376 | oup.com |
| 24 | Project Muse | 751 | jhu.edu |
| 25 | Royal Society of Chemistry Journals | 36 | rsc.org |
| 26 | Sage Publishing Journals | 1097 | sagepub.com |
| 27 | SPIE Digital Library | 16 | spiedigitallibrary.org |
| 28 | Springer Nature Journals | 2403 | springer.com |
| 29 | Taylor and Francis Journals | 2548 | tandfonline.com |
| 30 | Thieme Journals | 47 | thieme-connect.com |
| 31 | Wiley Journals | 1332 | wiley.com |
| 32 | World Scientific Publishing Journals | 143 | worldscientific.com |