Computers have evolved through , moving from massive room-sized machines using vacuum tubes to today's compact devices powered by microprocessors and integrated circuits.

Computer Fundamentals refers to the basic concepts that govern how a computer system operates, including its hardware components, software functions, and processing cycles. At its core, a computer is an electronic device that takes raw , processes it according to a set of instructions ( Software ), and produces meaningful Information ( Output ). Core Functional Units

: They can retain and quickly retrieve massive amounts of data.