A preprint is a draft of a scientific paper that has not yet been published in a peer-reviewed scientific journal. http://en.wikipedia.org/wiki/Preprint A few example of preprint servers in other disciplines are:- UK e-print archive mirror http://xxx.soton.ac.uk/ Open Archives Initiative http://www.openarchives.org/ PuMed Central http://www.pumedcentral.nih.gov/ American Mathematical Society Preprint Server http://www.ams.org/preprints/ CERN preprint Server http://preprints.cern.ch Chemical Physics Preprint Database http://www.chem.brown.edu/chem-ph.html Chemistry Preprint Server http://www.chemweb.com/preprint Economics Working paper Archive http://econwpa.wustl.edu/wpawelcome.html SISSA preprint server http://babbage.sissa.it/ High Energy Physics Preprint Database http://wwwspires.slac.stanford.edu/find/hep Nitride Semiconductor Research preprint server http://nsr.mij.mrs.org/preprints/ Clinical Medicine and Health http://clinmed.netprints.org/ Department of Energy's preprint Network http://www.osti.gov/preprint/ Theoretical Chemistry preprints http://www.chemie.uniregensburg.de/pub/preprint/GENINFO.html Regards, S.Sripriya --------------------------------- Any questions? Get answers on any topic at Yahoo! Answers. Try it now.