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.
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| IFAC IFC ifdef out IFDL IFF | 100BaseVG 3DO A3D AARP probe packets abstract class | IFIP IFP IFS IFX If you want X, you know where to find it. |
