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Saturday, January 16, 2016

AIOU SOLVED ASSIGNMENT 1 CODE 1431 BASIC OF ICT

SOLVED ASSIGNMENT 1 CODE 1431 AUTUMN 2015


Q 2:
Ans:

PURPOSE OF POINT AND DRAW DEVICE.


A point and draw device of a computer includes: a X axis and Y – axis driving gear system respectively mounted in a housing and generally orienting perpendicularly with each other, and a driving plate for driving the two gear systems slid ably held in the housing having an actuating portion protruding upwardly from the driving plate through a top window formed in an upper cover of the housing, whereby upon coordinative moving of the driving plate to move the X-axis or Y-axis driving gear system, a movement pulse signal can be electronically sensed for encoding the pulse signals into the computer to be decoded and red for moving a cursor on a CRT screen of the computer corresponding to the movement of the driving plate in the housing for an effective, reliable and ergonomic manipulation of the point and draw device.

The most common input devices are by far and keyboard and the mouse, which is a point and draw device. Most of our interaction with a computer is performed using one of these or a combination of the two. However there are many kinds of input devices that serve special needs.

There are several kinds of point and draw devices. The most notable is the mouse. Others include the following.
Ø  Joystick
Ø  Trackball
Ø  Mouse pen
Ø  Digitizer tablet and pen

Ø  Track points



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