... FTOOLS, a highly modular collection of over 110 utilities for processing and analyzing data in the FITS (Flexible Image Transport System) format, has been developed in support of the HEASARC (High Energy Astrophysics Science Archive Research Center) at NASA's Goddard Space Flight Center. ... The FTOOLS software package is designed to be both compatible with IRAF and completely stand alone in a UNIX or VMS environment. ... Figure: FTOOLS Task and Package Design. Original PostScript figure (21 kB) . ...