costart.html is a Javascipt application for searching the Coding Symbols for Thesaurus of Adverse Reaction Terms (5th Edition). The page can be saved to a local computer so that it can be accessed while that computer is not connected to the internet. To do this from the COSTART page, select Save from the File menu, and make sure to save the file as the type "Web page, complete .htm, .html" (Internet Explorer).