Doors CS is a shell and GUI for TI-83, TI-83+, TI-83+ Silver Edition, TI-84+, and TI-84+ Silver Edition graphing calculators. Doors CS is a free software initiative, and no copy of Doors CS may be sold or distributed for monetary or other compensation under the current license. Source code is available by contacting the author, but no alternate distributions made be made as per the the license distributed with the source. Cemetech, Doors CS, and Kerm Martian are in no way related or affiliated with Texas Instruments or TI. All TI trademarks are used only as identifying marks. The author and Cemetech are not responsible for any damage, physical, mental, emotional, or other adverse effects upon the user’s hardware or the user from this program.