Before that. DOS got it from Unix who, IIRC, got it from MULTIX.
"Ceterum censeo 0bama esse delendam."
Garde la Foi, mes amis! Nous nous sommes les sauveurs de la République! Maintenant et Toujours!
(Keep the Faith, my friends! We are the saviors of the Republic! Now and Forever!)
LonePalm, le Républicain du verre cassé (The Broken Glass Republican)
MULTICS - Multiplexed Information and Computing Service
Yeah, and think of the hub bub there would be should a dollar sign show up in the search box ! Woof!