What Does CIOS Stand For?

CIOS has more than one possible meaning :

• CIOS - Classical Infinite Order Sudden In Atom Mol Reaction Calcns
• CIOS - Complex Infinite Order Sudden Approxn In Quantum Calcns
• CIOS - Corrected Infinite Order Sudden Approxn In Mol Collisions

If you know of another acronym for CIOS, please suggest it as a new acronym for CIOS.