Computer education

HOW COMPUTERS WORK
Operating System
Computer Memory
Bus
Input Devices
Central Processing Unit
Output Devices

HOW A CPU WORKS
INTRODUCTION
Function
Branching Instructions
Clock Pulses
Fixed-Point and Floating-Point Numbers

HISTORY
Early Computers
Transistor
The Integrated Circuit

Output Devices


Once the CPU has executed the program instruction, the program may request that the information be communicated to an output device, such as a video display monitor or a flat liquid crystal display. Other output devices are printers, overhead projectors, videocassette recorders (VCRs), and speakers.

Input/Output Device, in computer science, a piece of hardware that is used for both providing information to the computer and receiving information from it. An input/output device thus transfers information in one of two directions depending on the current situation. A disk drive is an example of an input/output device. Some devices, called input devices, can be used only for input—for example, a keyboard, a mouse, a light pen, and a joystick. Other devices, called output devices, can be used only for output—for example, a printer and a monitor.

Most devices require the installation of software routines called device drivers, which allow the computer to transmit and receive information to and from the device.

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