Originally Posted by Valar Morghulis

Just prior to iCrew was a system called eCrew, which was essentially the same thing, but in Java, which was all the rage at the time.

Before that was text scrolling menus on a green screen. Enter your choice and hit enter, wait for the new screen to scroll. Anyone who had the old FDS software got a peek behind that curtain.

As Herk said, the underlying system is identical.