README file for ISIS. ISIS is a programmable, extensible data analysis system developed for use in high-resolution X-ray spectroscopy. It is currently distributed as source code and with precompiled binaries for selected operating systems. The lastest release is available from http://space.mit.edu/cxc/isis/download.html For installation instructions, read INSTALL.txt For news on recent changes and new features, read Changes.txt. A copy of the manual is included in the 'doc' directory. Additional information about ISIS is available from http://space.mit.edu/cxc/isis A mailing list is also available. See http://space.mit.edu/cxc/isis/mailing_list.html for more information. Contents: doc - ISIS documentation etc - local configuration information, including parameter file(s) describing local spectroscopy database(s) contrib - User-contributed scripts test - ISIS self-test data and scripts src - ISIS source code share modules - source code for loadable modules (e.g. XSPEC)