Arithmetic –logic unit (ALU)

Arithmetic Logic Unit, usually called the ALU, performs two types of operations- arithmetic and logical. Arithmetic and logical. Arithmetic operations are the fundamental mathematical operations consisting of addition subtraction, multiplication, division. Logical operations consist of comparisons. That is two pieces of data are compared to see whether one is equal to, less than, or greater than the other.

Memory

Memory- also known as the primary storage or main memory- is a part of the microcomputer that holds data to be processed, instructions for processing the data (the program) and the information (processed data).