Dear Colleagues: The OOF developers are pleased to announce that OOF2 version 2.1.1 is now available for download from the OOF2 website, http://www.ctcms.nist.gov/oof/oof2/ The new version fixes some bugs and should build correctly with Python 2.7. It can load more varieties of TSL .ang orientation map files. Some of the menus were rearranged for consistency. See http://www.ctcms.nist.gov/oof/oof2/changes.html for a more complete list of changes. A new web page, http://www.ctcms.nist.gov/oof/oof2/prerequisites.html, provides detailed instructions for installing the third party libraries that OOF2 requires using package managers on OS X, NetBSD, and various flavors of Linux. We welcome your feedback. Please send comments and requests to oof_manager@nist.gov, and bug reports to oof_bugs@nist.gov. Sincerely, Steve Langer Andrew Reid Valerie Coffman Gunay Dogan