Welcome to ISS Computer Education: KEY BOARD

Welcome to ISS Computer Education: KEY BOARD: KEYBOARD A keyboard is the most common input device. Several kinds of keyboards are available, but they resemble each other w...

KEY BOARD

KEYBOARD

A keyboard is the most common input device. Several kinds of keyboards are available, but they resemble each other with minor variations. The keyboard in most common use is the QWERTY board. Generally standard keyboard has 104 keys. In these keyboards, the cursor control keys are duplicated to allow easier use of the numeric pad.

LIGHT PEN

LIGHT PEN

An input device that utilizes a light-sensitive detector to select objects on a display screen. A light pen is similar to a mouse (as shown in except that with a light pen you can move the pointer and select objects on the display screen by directly pointing to the objects with the pen

Mouse

Mouse

A mouse is an elector-mechanical, hand-held device

It is used as a pointer. It can perform functions

like selecting menu commands, moving icons, resizing windows,

starting programs, and choosing options.

The most common mouse uses an internal, magnetically coated

ball, to detect the movement of the mouse across a flat surface,

usually a desktop. Now a days Optical or laser mouse is used to

detect the movement. All windows based applications today are

designed to work with a mouse. A mouse is used to replace hard

-to-remember key combinations with easier "Point and Click"

actions. However, it cannot substitute all keyboard operations.

It can be alternative for commands based operations.