Fundamental of Computer and Information Technology Book PDF Free Download
INTRODUCTION TO COMPUTER SYSTEM
Mouse
The mouse is a pointing device. The mouse is used to control and manipulate cursor movement on the monitor.
The mouse usually has three or four buttons on it and a rollerball that signals the movements made by the mouse on a flat surface.
These movements are transferred to the system. The mouse is rolled on a flat surface by the user.
It can be used independently, but normally it is used in conjunction with the keyboard to improve the efficiency of the input operation.
The mouse can be used to select data. Also, the mouse makes it possible to move fast from one part of the screen to the other.
The various types of mouse in use are
- Mechanical mouse
- Optical mouse
- Opt mechanical mouse
Light Pen
The light pen is a picking device. The light pen contains a photocell placed in a small tube. This photo-cell detects the presence of light on the CRT (monitor).
The tip of the pen is moved on the surface of the screen to write or sketch data. The light pen is especially useful in Computer-Aided Design (CAD) applications.
Joy Stick
The position and speed with which the joystick is moved are converted into digital signals by the use of a lever.
These signals are then sent to the computer system. This in turn controls the movement of the cursor on the screen. The joystick is mainly used in video games applications.
Track Ball
The trackball uses a hard-sphere to control cursor movement. The bail can be rotated in any
direction by hand and this is translated into a digital signal to control the cursor movement on the screen.
| Author | – |
| Language | English |
| No. of Pages | 109 |
| PDF Size | 8.7 MB |
| Category | Education |
Fundamental of Computer and Information Technology Book PDF Free Download