This document discusses various input devices used to enter data and instructions into a computer. It describes keyboards, touch screens, digital pens, mice, trackballs, light pens, joysticks, scanning devices, and speech recognition as common input devices. Keyboards are explained as allowing data entry by pressing keys, with different key types, and interfacing with the computer system through a keyboard controller and buffer. Touch screens and digital pens are summarized as enabling input through touch or capturing handwriting respectively.

1. Introduction To Computing

2. INPUT
DEVICES

3. Input:-
Any data and instruction entered into
computer.
INPUT DEVICES:-
Input devices is any hardware
component that allow user to enter data
and instruction in computer.

4. INPUT DEVICES
KEYBOARD
TOUCH SCREEN
DIGITAL PEN
MICE
MOUSE
TRACKBALL
LIGHT PEN
JOYSTICK
SCANNING DEVICES
SPEECH RECOGNITION

5. KEYBOARD
FUNCTION KEY
AIPHANUMERIC
KEY
MODIFIER
KEY
CURSOR
MOVEMENT
KEY
NUMERIC
PAD

7. WORKING OF KEYBOARD
Keyboard is an input device used for
entering data into computer by pressing
one key at one time.
KEYBOARD
CONTROLLER
KEYBOARD
BUFFER
SYSTEM
SOFTWARE
CPU

8. TOUCH SCREEN
A touch screen enable an user to choose
from available option by a simply
touching the desired screen.

9. DIGITAL PEN
A digital pen is an input device which
captures the handwriting or brush
strokes of a user, converts handwritten
analog information into digital data.

10. Voice input
Voice input is the process of entering
input by speaking into a microphone.
Voice recognition is the computer’s
capability of distinguishing spoken words.

11. END