IFF

from The Free On-line Dictionary of Computing (8 July 2008)
IFF

   1. <file format> {Interchange File Format}.

   2. Identify friend or foe (radar).
from The Free On-line Dictionary of Computing (8 July 2008)
iff

   <mathematics, logic> if and only if, i.e. necessary and
   sufficient.  For example, two figures are {congruent} iff one
   can be placed over the other so that they coincide.

   (2002-12-28)
antiflux / dictionary / IFF
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