CATIA V4 is supported for various flavours of Unix - IBM AIX, Hewlett Packard HP-UX, Silicon Graphics IRIX and Sun Microsystems Solaris. Catia V4 and its predecessor versions were also available for IBM MVS and VM/CMS mainframe platforms.
CATIA V5 is provided on the Microsoft Windows platform and, without the facility to use Visual Basic additions, on the above-mentioned Unixes.