OPERATIONAL CALCULUSoperational calculus · English · Reference checkedReferenceOpen English WordNet 2024oewn2024:lemma:OPERATIONAL CALCULUSTier 1Ordinal218Pythagorean74Classical206Reverse295Reverse Reduction115Standard1114Final Large1114Ordinal196Reduced61Atbash455Isopsephy1818Ordinal243Abjad880