A terminal window is a window that emulates a complete display terminal. Terminal windows are typically used to "fool" non-client programs into believing they are running in their favorite terminal -- not a difficult task in most cases. When not running programs or executing operating system commands, terminal windows display the command-line prompt. Several terminal emulators are supplied with X11- hpterm, which emulates HP terminals, xterm, which emulates DEC and Tektronix terminals, and dtterm, which emulates a DEC VT2200 terminal and has EUC 4-byte capability.