Cochrane reviews are published in full online in the Cochrane Database of Systematic Reviews (CDSR), which is a core component of The Cochrane Library. The Cochrane Library is published by Wiley-Blackwell on the Internet (www.thecochranelibrary.com) and on CD-ROM, and is available free at the point of use in some countries thanks to national licences and free access provided by Wiley-Blackwell in the most resource poor settings. Elsewhere it is subscription based, or pay-per-view. In addition to CDSR, The Cochrane Library contains several other sources of knowledge, listed in Box 1.1.b.
CDSR is published four times a year, each time with new reviews and updates of existing reviews. Issue 1, 2008 of CDSR contained more than 3000 Cochrane reviews and over 1700 protocols for reviews in progress.