One appropriate use of this emoticon is when one computer user, playing an online, multiplayer game, is reading text from a conversation between two or more other users, and the other users are not aware that the aforementioned first user is doing so. If this conversation should turn to a publically embarrassing subject, then the first user would type in and send (f;..;)f, making it known that he/she has read all of the previous conversation and may intend to tell the public or the nearby online community about what has just been said in the conversation
After User1 has been logged into a channel User2: Hey have you ever thought about whether or not you're gay?
User3: Well, between you and me, I have experimented with some other guys from across the hall, but I'm not really sure. Don't tell any of the clan members though -.-
User2: Nah, I wouldn't do that. The reason I ask is I've done the same thing as you and I think I might really be gay.
User1: (f ;..;)f Rawr!
The SI (International Standard in English) prefix for one "quintillion" or 10^18 or 1,000,000,000,000,000,000. The abbreviated denoted of exa- is E. This prefix is not in wide use since the quantity denoted by it is well beyond most industrial applications.
"Hey, I heard they're coming out with 1 exabyte harddrives next year!"
The inverse of impedance. Usually denoted as "Y" in electrical equations, or 1/Z, Z being impedance. The unit value of admittance is commonly dubbed "mhos" (backwards spelling of ohms.) It is a measure of the lack of impedance in a circuit, system of circuits or a specific conductor. A short circuit should, ideally, have an admittance of infinity. An open circuit will have an ideal admittance of 0 mhos.
Z = 10 ohms
Y = 1/Z = 1/10 = 0.1 mhos
Student 1: What's admittance?
Student 2: I don't know. I just use 1/Z.
Student 1: Oh ok.