From the SPARC website:
"SPARC®, the Scholarly Publishing and Academic Resources Coalition, is an international alliance of academic and research libraries working to correct imbalances in the scholarly publishing system. Developed by the Association of Research Libraries, SPARC has become a catalyst for change. Its pragmatic focus is to stimulate the emergence of new scholarly communication models that expand the dissemination of scholarly research and reduce financial pressures on libraries. Action by SPARC in collaboration with stakeholders – including authors, publishers, and libraries – builds on the unprecedented opportunities created by the networked digital environment to advance the conduct of scholarship"
Version of Record (VoR)
The published article. It is formatted in the style of the journal, complete with running headers/footers and with journal issue pagination. Authors usually receive a PDF copy from the publisher.
Accepted Manuscript (AM)
The author's final draft, or version of the article that has been accepted for publication in a journal. At this point the article has been been through peer review, but has not undergone copy editing or proof reading.
Author's Original Manuscript (AOM)
The un-refereed original version of an article, as initially submitted to a publisher.