Principals from more than 60 elementary, junior high, and senior high schools of Kaohsiung City, Taiwan, signed a "Software Freedom Manifesto" at the invitation of the city's Education Bureau on Sep 9 Thursday morning in a press conference. Also announced in the conference are the the upcoming events of International Conference on Open Source (ICOS), and the "mother tongue tux usb key" workshops designed for the growing population of Vietnamese mothers in Taiwan.