command structure of TOPS-10, the operating system for the PDP-10; commands could be abbreviated to their most simple and unique form. DECWAR allowed the user to enter coordinates in absolute, relative or computed format (one position +/- another). Finally, commands could be stacked on a line, allowing a list of commands to be executed at once. If the user wanted, the last command line could be re-entered by simply pressing the escape key. See also List of Star Trek games#Starship simulator games References 1978 video games Mainframe games Text games Unofficial works based on Star Trek Starship simulators based on Star Trek Video games with textual graphics Multiplayer video games Video games developed in the United States