Dear OOF Users -- A new version of OOF2, 2.3.3, is available on the OOF2 website: https://www.ctcms.nist.gov/oof/oof2. This version brings the OOF2 extension mechanism up to date and fixes a few bugs and inconsistencies. A new version of the manual describing OOF2 extensions will be available soon. In the meantime there is a README file in the EXTENSION_TEMPLATES directory in the OOF2 source code and further examples in SRC/EXTENSIONS. A new version of OOFCanvas, 1.1.2, is available at https://www.ctcms.nist.gov/oof/oofcanvas. This version fixes a couple of bugs and is much faster when displaying large numbers of objects. Please let us know if you encounter any problems. Report bugs to oof_bugs@nist.gov and send other comments to oof_manager@nist.gov. We especially like to hear about how you're using OOF2 and OOF3D now and how you'd like to use it in the future. Sincerely, The OOF developers Steve Langer Andrew Reid Gunay Dogan Shahriyar Keshavarz