slides

1. 5/19/2019
1

2. Course outlines
Introduction to computer and it parts
Power on self Test (POST)
CPU
Generations of computer
Computer memory
Input devices
Output devices
Classification of computers
Types of computer
Operating system and its type
Programming languages
5/19/2019
2

3. What is a Computer?
• [Norton] A Computer is an electronic device
that processes data, converting it into
information that is useful to people
• [Wikipedia] A Computer is a programmable
device, usually electronic in nature, that can
store, retrieve and process data
• [The American Heritage Dictionary]
1. A device that computes… especially a programmable
electronic machine that performs high-speed
mathematical or logical operations or that assembles,
stores, correlates, or otherwise processes information
2. One who computes

4. What is a computer?
Input
Processing /
Computation
Output
My Favourite Definition
Computer is an electronic device which takes input by an input device, processes it
and produces output by an output device

5. Parts of a Computer system
1. Hardware
2. Software
3. Data
4. user
• Hardware: physical parts of the computer
• Any part of the computer you can touch
• Processor
• Memory
• Input and output devices
• Storage devices
5/19/2019
5

6. Hardware…. Continue
5/19/2019
6

7. Software
•Instructions to the computer
•Software tells the computer what to
do
•Perform tasks, such as creating
documents or drawing pictures.
•Two types:
•System Software
•Application software
5/19/2019
7

8. System software
•Operating systems
Windows 98
Windows 10
linux
Os/2
•Disk Utilities
5/19/2019
8

9. Application software
•Word processing
•Graphics
•Databases
•Entertainment
•Educational
•presentation
5/19/2019
9

10. •Application software and system
software work together to
provide useful output.
•Software brings a computer to
life………….?
5/19/2019
10

11. Data
•Raw facts the computer can
manipulate
•Data consist of letters, numbers,
sounds or images
•Computer converts it into numbers
5/19/2019
11
Data
(images)
10101 information

12. people
• Also known as user
5/19/2019
12

13. An Overview of computer system
5/19/2019
13

14. Looking inside the Machine
 Secondary Memory (Auxiliary Memory)
 Permanent storage
 Hard Disk or Hard Drive
5/19/2019
14

15. RAM (Random Access Memory)
 Volatile
 Needs constant supply of Power
 Also Called Main memory or Primary memory
 Temporary storage of data
5/19/2019
15

16. ROM (Read only Memory)
 performs read operations
Non-volatile memory
Stores information permanently
 Accessible to user but not changeable
5/19/2019
16

17. processor
 Brain of Computer
Manages All devices and Performs the actual processing of
data
5/19/2019
17