Quantitative Feedback Theory. It is a theory that describes the use of feedback for control systems. Many control engineering challenges were solved by means of these ideas. The godfather of QFT was Prof. Isaac Horowitz, continuing the work by H.W.Bode.
Flight Control Systems (FCS), wind turbines, smart structures, robotics... are practical examples of applications of QFT-based designs.
by Igor Egana November 16, 2005

Used on Internet chat rooms when a person is trolling.

Can be confused with QFT:Quoted For Truth
Person 1:I dare you to prove me wrong
Troll:I dare you to stop posting!
Person 1:QFT!!
by straad October 17, 2007
Quite Fucking True. used in internet forums to agree with an idea or suggestion.
Rap doesnt make kids sell drugs. kids know that drugs r expensive so they will make lotsa money

QFT!!! i makes all my money on drugs
by Guadalupe August 08, 2006
Quit Fighting Thugs, it's bad, mkay?
"Dear, please QFT!"

"Sure mom"
by Von Gam August 03, 2006
QFT = QFE for idiots. Devised by those who lack an understanding of the word "Emphasis". Quoted for Emphasis is essentially the same as Quoted for Truth, only it makes sense. If you are quoting something "for truth", you are quoting it for, get this - EMPHASIS.

'QFT' is usually used by children (i.e, under 13) who have clearly not had internet access long enough. Thus it is usually found on forums with something to do with children's games - namely CS, and various MMOs.
"u suck lol get a life!! u r so awseom lololr lmao"

QFT lol u rok lmao
by Osmodius October 24, 2005
Quit Fucking Talking

Used on internet message boards when you want someone to stop talking.
QFT you fucking asshole!
by blont June 09, 2005
quality family time, always said sarcastically, since there is obviously no such thing
"my moms new kick is QFT- i'm booked every weekend through march doing craft shows and shit like that."
by lauren September 01, 2003

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