What are the main ways to deliver OA literature?
There are two primary vehicles for delivering OA to research articles, OA journals (“gold OA”) and OA repositories (“green OA”). The green/gold distinction is about venues or delivery vehicles, not user rights or degrees of openness. The chief difference between them is that OA journals conduct peer review and OA repositories do not. This difference explains many of the other differences between them, especially the costs of launching and operating them. There are other OA vehicles (e.g., personal web sites, ebooks, discussion forums, email lists, blogs, wikis, videos, audio files, RSS feeds, and P2P file-sharing networks).
