Very interesting -- thanks for posting! My how technology has advanced since the 1970's! I entered railroading in 1970 during the teletype/card punch/typewriter/carbon paper era. My wife says that's probably why I pound so hard on my smart phone now! I also remember the change in GTW paint schemes from the green/gold to black/orange to blue/red. Notice all of the personnel it required back then to do what probably a handful of people accomplish now with I.T.