A preprint is a draft of a scientific paper that has not yet been published in a peer-reviewed scientific journal.
A few example of preprint servers in other disciplines are:-
UK e-print archive mirror
Open Archives Initiative
PuMed Central
American Mathematical Society Preprint Server
CERN preprint Server
Chemical Physics Preprint Database
Chemistry Preprint Server
Economics Working paper Archive
SISSA preprint server
High Energy Physics Preprint Database
Nitride Semiconductor Research preprint server
Clinical Medicine and Health
Department of Energy's preprint Network
Theoretical Chemistry preprints
Regards,
S.Sripriya
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