ALU stands for “Arithmetic and Logic Unit” which perform all the arithmetic (Addition, subtraction, multiplication, division) and logic functions such as ( greater than, less then, equal or not equal) and also handle the Boolean algebra ( And, Or, Xor, not) operations.

It is the main part of CPU (Central Processing Unit) which play significant role in processing speed of CPU which is known as brain of every computer. A basic ALU has three parallel data buses consisting of two input operands (A and B) and a result output (Y). Each data bus is a group of signals that conveys one binary integer number.

The status outputs are various individual signals that convey supplemental information about the result of an ALU operation. These outputs are usually stored in registers so they can be used in future ALU operations or for controlling conditional branching.

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Martin Cooper (inventor) Inventing handheld cellular mobile phone Making world’s first handheld cellular mobile phone call. Martin “Marty” Cooper (born December 26, 1928) is an American engineer.