DECO or Demos Commander is a visual front-end to the UNIX operating system, similar to the Norton Commander. Usually, DECOS displays two fields. In each of these, the contents of a directory is listed. The program is controlled using the keyboard. Use the cursor keys to choose a file, press return to select it; TAB changes between the two fields. Commands can be executed by using the F-keys or the menu. Additional commands can be added by the user. Unfortunately, the sources for this program are not freely available.