CEARUN is a GUI that sets up and runs the iconic NASA computer program Chemical Equilibrium with Applications (CEA), written by Sanford Gordon and Bonnie McBride, and documented in NASA RP-1311 part 1(1994) and part 2(1996). CEARUN can be used freely by anyone who wants to. If you have difficulty with the site, please send an email to firstname.lastname@example.org. Any questions or suggestions should be also be directed to email@example.com. Have fun.