Open Source Certification:Press Releases Page created on March 14, 2007 | Last modified on September 7, 2022 Announcement of “OSI Certified” Open Source Mark On June 15 1999 ZDNet broke the news that OSI’s application for an Open Source trademark had lapsed, anticipating the public statement OSI had planned to make following its board meeting on 17 June. Subsequently, many people have expressed co