In my opinion, gnu screen is one of the best utilities for unix operating systems ever written. Not just because of what it lets you do explicitly, but the way it changes the way a unix system can be used. Using continuously-running apps in multiplexed windows did wonders for my communications and file management.<p>I even remember my screen windows from high school! (0-user,1-root,2-mutt,3-naim[aim client],4-irssi,5-7-misc) My friends who also used screen had their own window groups. I also remember my keyboard having the 'A' key significantly more worn than others.<p>I have since switched to GUI chat and email apps, but I instantly feel nostalgic whenever these articles pop up.