Exstemsia v1.0 was the first in the line of Exstemsia Operating Systems. Support for Exstemsia v1.0 ended on January 1st, 1992.
Exstemsia2 was released in 1986 and support for Exstemsia2 ended on April 7th, 1996.
Exstemsia3 was released in 1988 and was considered a failure as the OS was packed with bugs and crashed constantly. Support for Exstemsia3 ended on February 4th, 1990.
Exstemsia Decade (1990-2001)
Exstemsia Decade was the "next step" for Exstemsia. Support ended on September 19th, 2001.
Exstemsia Pente (1994-2003)
The Exstemsia typeface was changed due to legal action from the Public Broadcasting Service (PBS) for the typeface being to similar to their logo from 1971. Support for Exstemsia Pente ended on March 6th, 2003.
Exstemsia Manchester (1996-2006)
Support for Exstemsia Manchester ended on June 19th, 2006.
Exstemsia You (1999-2010)
Support for Exstemsia You ended on July 1st, 2010.
Exstemsia Next (2001-2017)
Exstemsia Next was the most popular Exstemsia OS selling over 430 million copies in its life. Support for Exstemsia Next ended on January 1st, 2017.
Exstemsia Atom (2006-2020)
Exstemsia Atom also did well after Windows Vista's release. Support for Exstemsia Atom ended on October 8th, 2020.
Exstemsia Tenth (2010-2025)
Exstemsia Tenth was the tenth installment of Exstemsia. There are 10 squares in the logo. Support for Exstemsia Tenth will end on December 11th, 2025.
Exstemsia Rapida (2016-2028)
Support for Exstemsia Rapida will end on April 13th, 2028.
Exstemsia After (2020-2039)
Exstemsia After is the most recent Exstemsia Operating System released January 1st, 2020. Support will end on September 15th, 2035.
Exstemsia 13.0? (202?)
Not much is known about this release of Exstemsia so far, as this doesn't seem to be the final name. The release and end of support dates are currently unknown.