_commands.put("close", new Clear(this));
_commands.put("copy", new Copy(this));
_commands.put("dump", new Dump(this));
_commands.put("help", new Help(this));
_commands.put("list", new List(this));
_commands.put("load", new Load(this));
_commands.put("move", new Move(this));
_commands.put("purge", new Purge(this));
_commands.put("quit", new Quit(this));
_commands.put("select", new Select(this));
_commands.put("show", new Show(this));