Only slightly related, but if you're on board the aircraft already at DFW...
Look out the right side window, forward toward the terminal. You'll see a red LED board on the outside wall. It deciphers this way (IIRC)
Flt#/Destination
Tail#/Departure time +- mins. ahead/behind sked
Think the same applies at ORD, too.
[This message has been edited by SuperSlug (edited 12-06-2001).]