four arithmetic operations;  basic arithmetic operations
 functional unit (e.g. in analog computing)
 logic operation;  logical operation
 floating-point arithmetic
 central processing unit;  CPU
 high-speed arithmetic unit (computer)
 compute mode;  operate mode
 Arithmetic and Logic Unit;  ALU
 arithmetic and control unit;  ACU
 arithmetic and logic unit;  ALU
 real-time operation (e.g. in analog computing)
 monadic operation;  unary operation
 equivalence operation;  IF-AND-ONLY-IF operation;  IFF
 exclusion;  NOT-IF-THEN operation
 non-equivalence operation;  EXCLUSIVE-OR operation
 iterative operation;  automatic sequential operation
 no operation instruction;  no op
 significant digit arithmetic
 binary operation;  dyadic operation