A hard drive is a disk drive used to read from and write to a hard disk.
An optical drive in a computer system allows you to use CDs, DVDs, and Blu-ray discs to listen to music or watch a movie.
A monitor or a display is an electronic visual display for computers. The monitor comprises the display device, circuitry and an enclosure.
A central processing unit (CPU) is the electronic circuitry within a computer that carries out the instructions of a computer program.
RAM (random access memory) is the place in a computer where the operating system, application programs, and data in current use are kept so that they can be quickly reached by the computer's processor.
A motherboard is the main printed circuit board (PCB) found in computers and other expandable systems.
For instance, a keyboard or mouse is an input device for a computer, while monitors and printers are output devices.
An operating system Manages the computer's memory, processes, and all of its software and hardware. It also allows you to communicate with the computer without knowing how to speak the computer's language.
Alan Mathison Turing, OBE, FRS was a British pioneering computer scientist, mathematician, logician, cryptanalyst, philosopher, mathematical biologist, and marathon and ultra distance runner.
Kate Russell - Alan Turing
The four generations of computers
Each of the five generations of computers is characterized by a major technological development that fundamentally changed the way computers operate.