PowerOS/Codenames

This is an incomplete list of codenames that have been used for PowerOS versions
 * PowerOS 1.0: PowerOS (1872)
 * PowerOS 2.0: Second Release (1876)
 * PowerOS 3.0: Tenth Anniversary Release (1882)
 * PowerOS 3.1: Thirteenth Anniversary Release (1885)
 * PowerOS 5.0: Fifth Release (1907)
 * PowerOS 6.0: Pre-Great War Release (1913)
 * PowerOS 7.0: Post-Great War Release (1918)
 * PowerOS 9.0: Great Depression Release (1931)
 * PowerOS 10.0: Post-War Release (1948)
 * PowerOS 11.0: Cold War Release (1958)
 * PowerOS 12.0: Pre-Century Release (1964)
 * PowerOS 13.0: Pre-Century Release (1967)
 * PowerOS 14.0: Century Release (1972)
 * PowerOS 15.0: Post-Century Release (1977)
 * PowerOS 16.0: "Windows Cloned Us" Release (1985)
 * PowerOS 17.0: Modernization Release (1987)
 * PowerOS 17.01: Open Source Release (1987)
 * PowerOS 18.0: New Decade Release (1990)
 * PowerOS 18.1: Serbia (1992)
 * PowerOS 19.0: Cyclone (1995)
 * PowerOS 20.0: Neptune (2000)
 * PowerOS 21.0: Odyssey (2003)
 * PowerOS 22.0: Austria (2007)
 * PowerOS 23.0: Hungary (2010)
 * PowerOS 24.0: Batman (2013)
 * PowerOS 24.1: Robin (2014)
 * PowerOS 25.0: Tornado (2018)
 * PowerOS 26.0: Starlight
 * PowerOS 27.0: Ratzeburg