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Foot Note
Code FN shown on display and function on equipment not working .
The FN key stands for function and then your f1 f2 ...... keys Also, in mathematics it stands for Fibonacci number, Fn. But you probably mean on the computer keyboard.
There is no Fn on the periodic table of elements. However, there is Fm, Fermium, number 100.
A semi auto variant, with a 16" barrel, is sold on the US civil market.
a part of the sn
Fn = Fn-1 + Fn-2
FN is the abbreviation for Fabrique Nationale Arms Co. of Herstal, Belgium. They made most of the A-5 shotguns and Superposed shotguns for Browning USA.
The Fn button is the function key. A key that works like a shift key to activate the second function on a dual-purpose key.
I have searched for answers to this question as well myself, the best that i could come up with was that "fn" indicates that a jewelry item is plated with a "finish"...... Basically fn is an opaque way of saying the item isn't real gold, just plated.
Fn = Fn-1 + Fn-2 And F0 = F1 = 1
FN