Open Access (OA) is "the free, immediate, online availability of research articles coupled with the rights to use these articles fully in the digital environment" (SPARC).
See also our guide on Open Educational Resources and the Open@UM Toolkit.
Gold OA is immediate and unrestricted access to the journal article as published, usually with a Creative Commons licence.
Green OA refers to deposit of a pre-print or post-print of the manuscript to a repository, sometimes after an embargo period.
This guide is licensed CC BY-SA.