FO means Function Of .... in Mathematics
Similar to FO
ACELP - Algebraic Code Excited Linear PredictionACHR - Axiomatic Combinatorial Hamiltonian Recursive
ACIP - Absolutely Continuous Invariant Probability
ACM - Alternative Calculation Method
ACS - Auxiliary Constraint Set
AD - Average Difference
ADE - Algebraic Differential Equation
View all in Mathematics