The Mop is the program developed for cleaning-up of a hard disk of your computer from so-called junk files. Junk files are service files which take free space on a hard disk, but are not used by any program. A typical example of such files are the time files created practically by any modern appendix (for example, Microsoft Word or Excel). Other example are the *.gid-files created at viewing of files of help system (*.hlp).