A definition of the file formats is available at the bottom of this page. All file sizes are approximate.
Standard that the Microsoft FTP site really does not have that much on it but you can sometimes find some good stuff.
Cool site if you need RPMs for any version of Linux (Red Hat versions) .
.bas Visual Basic source file, in text format .exe Windows executable program .ps PostScript file .ps.Z compressed PostScript file, for UNIX .tar UNIX archive file .tar.Z compressed UNIX archive file .zip Windows archive file