Open access (OA) - research output is made openly available in digital form (a publishing business model and an ideal)
APC (Article Processing Charge) - a charge which some journals or publishers charge for making an article open access. Also called open access fee or author fee.
Creative Commons (CC)-license - a copyright license attached to online material by its creator to let other users know what rights they have and do not have to re-use - share, modify, copy, sell the material.
Digital Object Identifier (DOI) - a permanent identification number for digital documents
Embargo - a restriction on how soon after publishing an article can be made openly available in an open repository or elsewhere on the Internet
Gold open access - the publisher makes the scholarly article openly available (in some cases against a fee, in other cases for free). Two main models: full open access publication and hybrid publications.
Hybrid open access - a form of gold open access, when an article published in a subscription journal is made open access using an additional service against a fee. In a hybrid journal, only some of the articles are openly available and the rest behind paywalls.
Gratis open access - the publication is free to read online, but the reuse of it might be bound up with restrictions.
Green open access = parallel publishing = self-archiving = a version of an article primarily published in a subscription journal is archived in an open archive or repository, for instance the university's institutional repository or open archive.
Libre open access - the publication is free to read online but also void of technical or legal restrictions for reuse (for instance as communicated with the help of Creative Commons licenses)
Sherpa/Romeo - an online database which contains information on publishers' and journals' green open access/copyright policies.
Post-print - the author's accepted manuscript: the peer reviewed version of an article, in which some changes may have been made after first submission, but which has not been typeset or copy-edited by the publisher. The very last version edited by the author. (Not the same as the proofs, which usually are typeset).
Pre-print - submitted version, the manuscript of an article which has not yet been peer reviewed.
Parallel publication = self-archiving = green open access - the publication is made openly available in an open repository, for instance the open research information database of the university.