A preprint is a version of a scholarly or scientific paper that precedes formal peer review and publication in a peer-reviewed scholarly or scientific journal. The preprint may be available, often as a non-typeset version available free, before and/or after a paper is published in a journal.
|Preprint||Manuscript before peer review.|
|Postprint||Manuscript after peer review that includes changes made by the author as a result of the peer review process; also called the final, peer-reviewed manuscript version.|
|Galley Proof||The publisher's draft copy of the published version sent to the author for review before publishing.|
|Final||The publisher's final version of the manuscript that includes the DOI, publisher icons, pagination, graphics, etc.; also called the "version of record.|
The National Library of Medicine (NLM) has launched a pilot project to test the viability of making preprints resulting from NIH-funded research available via PubMed Central (PMC). The primary goal of the NIH Preprint Pilot will be to explore approaches to increasing the discoverability of early NIH research results. The pilot started the week of June 8, 2020 and will initially focus on increasing the discoverability of preprints with NIH support relating to the current COVID-19 pandemic. For more information: