Introduction to Computer & ICT

The presentation deals with the Introduction to Computer and Information Technology

1. Information & Communication Information & Communication
TechnologyTechnology
ByBy
Dr. Pravin H. GhosekarDr. Pravin H. Ghosekar
M.Sc.(C/S), MCM, DBM, M.Phil(IT), M.Phil(Comm), MBA, BJ. Ph.D.M.Sc.(C/S), MCM, DBM, M.Phil(IT), M.Phil(Comm), MBA, BJ. Ph.D.
HOD Computer DepartmentHOD Computer Department
Dhanwate National CollegeDhanwate National College
NagpurNagpur
08/10/201008/10/2010

2. Information Technology
The word Data is the plural of Datum. It is defined as raw facts or
observations, or business transactions .
Information :
Data :
•The processed data is known as information. It is an finished
product.
•The information must be received by the recipient on time & it
should be correct.
•The Technology plays an important role in delivering timely and
accurate information to its recipient.
•Technology includes H/W, S/W, database, communication system.

3. Information Technology
Information Technology means
the collection, storage,
processing, disseminations and use
of information using Technology.

4. Communication
Communication is a process in which
information is enclosed into packets and is
send from sender to receiver using some
medium/channel.

5. Information and Communication
Technology ( ICT )
ICT is effective use of communications (telephone
lines and wireless signals) in modern information
technology.
ICT consists of all technical means used to handle
information and communication aid , including both
computer and network hardware as well as necessary
software.
In other words, ICT consists of IT as well as
telephony, broadcast media, and all types of audio and
video processing and transmission.

6. Computer
The word “Computer” means ‘to compute’ or ‘to
calculate’.
It may be defied as a device that can operate upon
information or data.
A computer accepts data from an input device and
processes it into useful information which it displays
on its output device.
Thus, Computer is an electronic device that stores,
retrieves and processes data. It can perform various
arithmetic and logical operations as per instructions
given.

7. Block Diagram/Architecture
Secondary
Storage
Primary
Storage
Control
Unit
Arithmetic
Logic Unit
Input Unit Output Unit
Storage Unit
Central Processing Unit (CPU)
indicates flow of
instructions & data
Indicates the control
generated by the
control unit
Block Diagram of Computer

8. CPU
Central Processing Unit
• Memory Unit
• Control Unit
• ALU (Arithmetic and Logical Unit)

9. Generation of Computers
• 1
st
Generation (1940-56) : Vacuum Tube
• 2
nd
Generation (1956-63) : Transistors
• 3
rd
Generation (1964-71) : IC or SSI
• 4
th
Generation(1971-Present) : LSI/VLSI
• 5
th
Generation (Present & Beyond)
‘Generation’ in a computer terminology is a
‘steps’ in a technology

10. Types of Computer
• Analog Computer
• Digital Computer
• Hybrid Computer

11. Classification of Computer
• Micro Computer
• Mini Computer
• Mainframe Computer
• Super Computer

12. Characteristics of Computers
• Speed
• Accuracy
• Memory
• Diligence
• Versatility
• Reliability
• Reduced cost

13. ThanksThanks