Earliest uses on Usenet I can find with Google Groups:
- RTFM: net.unix-wizards - 24 Apr 1984 by rcj: 
- RTFM'S: net.unix-wizards - 7 Sep 1985 by Bruce Karsh: 
- RTFMs: net.unix-wizards - 9 Sep 1985 by Brett Fleisch: 
— Hippietrail 16:18, 25 Jul 2004 (UTC)
Changed dutch translation (it was Godverdomme, which means Goddamned,) changed it to damned; Added Read The Freaking Manual (Stumbled appon this page and couldn't resist the urge to change this entry) Anonymous...