Open Access glossary

APC Article Processing Charge. The amount of money to make an article Open Access (Golden Open Access).
CTA Copyright Transfer Agreement.
DTU Orbit DTU's repository; orbit.dtu.dk
Green Open Access Self-archiving by the author (or the author's institution) in an open repository.
Golden Open Access The author (or the author's institution) makes a one-off payment to the publisher to make the article open access.
Journal type Traditional, hybrid or Open Access:
1) Traditional journals do not offer Open Access.
2) Hybrid journals are traditional journals that offer to provide Open Access to individual articles but charge a fee from the author for this service (APC).
3) Open Access journals are free for the end-user. Some of the journals do, however, ask for a fee from the authors (APC).
Open Access Journals Directory of Open Access Journal (DOAJ) is a directory of Open Access Journals.
Parallel publishing The article is published in a journal by a publisher and subsequently made available Open Access in a repository.
Peer-review Peer-review is the process where the author's work of research or theories are assessed by experts within the same field of expertise.
Post-print 

The post-print has been peer-reviewed and accepted for publication but still lacks formal publisher layout. The intellectual content is identical to the version, which will  be published by the journal.

Pre-print A pre-print is a draft version of a scientific article. It has not been peer-reviewet and is not necessarily identical to the final and published article.
Publisher version Publisher version is the published article.
Repositories A repository is an online system to collect, preserve and communicate scientific products in a digital format. DTU's repository is called DTU Orbit.
See list of Open Access repositories
.
Self-archiving The author (or the author's institution) deposits the article in a repository. Most publishers allow Open Access self-archiving of the pre-print or post-print of the article.
SHERPA / RoMEO SHERPA / RoMEO is a website with an index of the different publishers' Open Access policies.
Toll Access This means that there is only access to the article if you subscripbe to the journal.