Chapter One
Introduction to Computer
Computer
A computer is an electronic device, operating under the control of instructions stored
in its own memory that can accept data (input), process the data according to specified
rules, produce information (output), and store the information for future use1.
Functionalities of a computer2
Any digital computer carries out five functions in gross terms:
Computer Components
Any kind of computers consists of HARDWARE AND SOFTWARE.
Hardware:
Computer hardware is the collection of physical elements that constitutes a computer
system. Computer hardware refers to the physical parts or components of a computer
such as the monitor, mouse, keyboard, computer data storage, hard drive disk (HDD),
system unit (graphic cards, sound cards, memory, motherboard and chips), etc. all of
which are physical objects that can be touched.3
1
Vermaat, Misty E. Microsoft Office 2013 Introductory. Cengage Learning, p.IT3. 2014
2
http://www.tutorialspoint.com/computer_fundamentals/computer_quick_guide.htm
3
http://en.wikipedia.org/wiki/Computer_hardware
1
, Input Devices
Input device is any peripheral (piece of computer hardware equipment to provide data
and control signals to an information processing system such as a computer or other
information appliance.
Input device Translate data from form that humans understand to one that the computer
can work with. Most common are keyboard and mouse
Example of Input Devices:-
1. Keyboard 2. Mouse (pointing device) 3. Microphone
4. Touch screen 5. Scanner 6. Webcam
7. Touchpads 8. MIDI keyboard 9.
10. Graphics Tablets 11. Cameras 12. Pen Input
13. Video Capture Hardware 14. Microphone 15. Trackballs
16. Barcode reader 17. Digital camera 18. Joystick
19. Gamepad 20. Electronic Whiteboard 21.
Note: The most common use keyboard is the QWERTY keyboard. Generally standard Keyboard
has 104 keys.
2
Introduction to Computer
Computer
A computer is an electronic device, operating under the control of instructions stored
in its own memory that can accept data (input), process the data according to specified
rules, produce information (output), and store the information for future use1.
Functionalities of a computer2
Any digital computer carries out five functions in gross terms:
Computer Components
Any kind of computers consists of HARDWARE AND SOFTWARE.
Hardware:
Computer hardware is the collection of physical elements that constitutes a computer
system. Computer hardware refers to the physical parts or components of a computer
such as the monitor, mouse, keyboard, computer data storage, hard drive disk (HDD),
system unit (graphic cards, sound cards, memory, motherboard and chips), etc. all of
which are physical objects that can be touched.3
1
Vermaat, Misty E. Microsoft Office 2013 Introductory. Cengage Learning, p.IT3. 2014
2
http://www.tutorialspoint.com/computer_fundamentals/computer_quick_guide.htm
3
http://en.wikipedia.org/wiki/Computer_hardware
1
, Input Devices
Input device is any peripheral (piece of computer hardware equipment to provide data
and control signals to an information processing system such as a computer or other
information appliance.
Input device Translate data from form that humans understand to one that the computer
can work with. Most common are keyboard and mouse
Example of Input Devices:-
1. Keyboard 2. Mouse (pointing device) 3. Microphone
4. Touch screen 5. Scanner 6. Webcam
7. Touchpads 8. MIDI keyboard 9.
10. Graphics Tablets 11. Cameras 12. Pen Input
13. Video Capture Hardware 14. Microphone 15. Trackballs
16. Barcode reader 17. Digital camera 18. Joystick
19. Gamepad 20. Electronic Whiteboard 21.
Note: The most common use keyboard is the QWERTY keyboard. Generally standard Keyboard
has 104 keys.
2
