Computer history

How a computer works

Hard Drive

The hard disk is the main, and largest, data storage in a computer.

The operating system, files and other software titles are stored in the hard disk drive.


A device used for observing, checking, or keeping a continuous record of something.


The Central Processing Unit (CPU) is responsible for interpreting and executing most of the commands from the computer's hardware and software.


A RAM (pronounced ramm) is an acronym for random access memory, a type of computer memory that can be accessed randomly.


The definition of a motherboard is an insulated board within an electronic device into which circuits or wires are connected and plugged.


A keyboard or mouse is an input device for a computer, while monitors and printers are output device.

Touch Screens

  1. A touch screen is a computer display screen that is a input device. They work by touching pictures or words on the screen.

Operating Systems

The operating system is the most important program that runs on a computer.

Tim Berners-Lee

Tim Berners-Lee is the inventor of the World Wide Web.

Alan Turing

Alan Turing was the founder of computer science.

The four generations of computers

First generation: The computer used the vacuum tubes. An 1943, the Electronic Numerical Integration And calculator was design.

Second generation: came into existence. Transistors were small, fast and more reliable for less power.

Third Generation: the integrated circuits appeared into the field of microelectronics.

Fourth Generation: The microprocessor chip, which contains an entire central processing unit on a single silicon chip, led to construction of inexpensive computers.