Original sentence: Computer scientists had been self-archiving in anonymous ftp archives since the 1970s and physicists had been self-archiving in arxiv since the 1990s.Gratis OA refers to free online access, and libre OA refers to free online access plus some additional re-use rights rights.In order to reflect actual practice in providing two different degrees of open access, the further distinction between gratis OA and libre OA was added in 2006 by two of the co-drafters of the original BOAI definition.The Budapest, Bethesda, and Berlin definitions had corresponded only to libre OA.The Subversive Proposal to generalize the practice was posted in 1994.The idea and practise of providing free online access to journal articles began at least a decade before the term "open access" was formally coined.The term "open access" itself was first formulated in three public statements in the 2000s: the Budapest Open Access Initiative in February 2002, the Bethesda Statement on Open Access Publishing in June 2003, and the Berlin Declaration on Open Access to Knowledge in the Sciences and Humanities in October 2003
Edited sentence: Gratis OA means free online access, and libre OA means free online access plus some additional re-use rights rights.In order to distinguish between two different types of open access, the terms gratis OA and libre OA have been proposed.Only libre OA meets the Budapest, Bethusda, and Berlin definitions of open access.The idea of open access was first formulated in three public statements – the Budapest Open Access Initiative in February 2002, the Bethesda Statement on Open Access Publishing in June 2003, and the Berlin Declaration on Open Access to Knowledge in the Sciences and Humanities in October 2003