This issue of the quarterly journal Information Technology and Libraries (ITAL) focuses on open source software (OSS) and its use in the library community. About half of the articles are available for public viewing; the rest are for subscribers only. The first article provides a good account of the history of OSS, with specific attention given to three popular OSS operating systems. The next article considers many opportunities that OSS has in libraries and emphasizes the potential benefits. Lastly, the author of the final article warns that, before OSS can become a powerful tool, its developers must be connected with standards that can be universally understood. For further reading, the ITAL home page offers full text of selected articles in issues dating back to 1999.