Simplify the following text for a Grade 9 native English-speaking person.
Original: It contains X11 , emacs , vi , cc , gcc , perl , python , ash , bash , zsh , ftp , ssh , telnet , pine , and over 400 other common Unix utility programs .
Simplified: It contains X11 , emacs , vi , cc , gcc , perl , python , ash , bash , zsh , ftp , ssh , telnet , pine , and over 400 other common UNIX programs .