Why did the microprocessor make computers smaller and less expensive?

The microprocessor revolutionized computing by consolidating the central processing unit (CPU)—which includes arithmetic, logic, and control circuitry—onto a single integrated circuit chip.12

Why Computers Became Smaller

Before the microprocessor, computers were large, discrete systems ranging from the size of filing cabinets to entire rooms. The development of large-scale integration (LSI) allowed engineers to pack thousands of transistors, diodes, and resistors onto a tiny silicon chip. This miniaturization enabled the creation of microcomputers, which could perform complex tasks while being small enough to fit on a desk or in a home.21

Why Computers Became Less Expensive

The transition to microprocessors significantly lowered costs through:
* High-Volume Production: The widespread demand for microprocessors in various consumer products, such as microwave ovens and automobiles, drove mass production, which dramatically reduced the cost per unit.12
* Manufacturing Efficiency: Improved manufacturing methods and the ability to integrate complex circuitry onto a single chip eliminated the need for expensive, bulky components.2
* Economies of Scale: As Moore’s law predicted, the increasing density of circuits on chips allowed for more powerful computers at lower costs, making personal computers accessible for schools, offices, and homes.2