The document provides an overview of information technology, focusing on computer systems, communication technology, and software types. It discusses the components of a computer, various types of memory, storage devices, networking technologies, and the role of operating systems. Additionally, it highlights specific applications such as word processing and presentation graphics.

2. CONTENTS ………..
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3. • Information technology is the study of engineering
computer applications to support the operation of an
organization : operating , installing and maintaining software
and data.
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4. 
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COMPUTER
COMMUNICATION TECHNOLOGY
CONTENT TECHNOLOGY
CHARACTERISTICS OF A COMPUTER
COMPONENTS OF A COMPUTER
SYSTEM
 MEMORY
 UNITS OF MEMORY
 STORAGE DEVICES
 TYPES OF SOFTWARE
 COMPUTER NETWORKING
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5. A computer is a programmable electronic
device. It takes data through input devices. It
processes the data according to a sequence
of instructions provided in the form of a
program. The result is called the output and
given through some output device.
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6. • Communication technology is the
study of technology applications used
in telecommunications.
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8. CHARACTERISTICS OF A COMPUTER
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9. COMPONENTS OF A COMPUTER
SYSTEM
 INPUT UNIT
PROCESS (CENTRAL PROCESSING
UNIT)
 OUTPUT UNIT
 AUXILLARY
STORAGE/
SECONDARY STORAGE UNIT
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10. Computer uses several different types of memory. They
are : 
INTERNAL MEMORY
RAM )
Main memory (
Cache
memory
MAIN MEMORY
 EXTERNAL MEMORY
memory
• RAM is volatile.
• It is temporary memory.
• It has limited storage
capacity.
• It is very expensive.
• It is not portable.
SECONDARY MEMORY
Secondary
• It is non volatile.
• It is permanent
memory.
• It has large storage
capacity.
• It is cheaper .
• It is portable.
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12. Secondary storage devices are classified into two types : MAGNETIC STORAGE MEDIA
OPTICAL STORAGE MEDIA
 FLOPPY DISK
 CD ( COMPACT DISC )
 HARD DISK
 PEN DRIVE
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13. TYPES OF SOFTWARE
• SYSTEM SOFTWARE
• APPLICATION SOFTWARE
• UTILITY SOFTWARE
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15. APPLICATION SOFTWARE
• Application software are a set of program
that are put together for specific purpose or
task. There are two types of application
software:• General Purpose Application Software
• Customized Software
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16. • Utility software is a small program that
provides additional capabilities to the
operating system.
• For example :- disk defragmenter ,
registry cleaners.
• WinZip is very popular compression and
archive utility .
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17.  LAN ( LOCAL AREA NETWORK )
 MAN ( METROPOLITAN AREA NETWORK )
 WAN ( WIDE AREA NETWORK )
 INTERNET
 WIRED NETWORKING TECHNOLOGY
 WIRELESS NETWORKING TECHNOLOGY
 WI-FI TECHNOLOGY
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18. A local area network is a
computer network that
interconnects computers in a
limited area such as a home,
school, computer laboratory, or
office building using network
media .
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20. A wide area network (WAN) is
a network that covers a broad
area (i.e., any
telecommunications
network that links across
metropolitan, regional, or
national boundaries) using
private or public network
transports.
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22. 1.
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14.
COMMUNICATION
RESEARCH
DISTANCE EDUCATION
BOOKING E- TICKETS
PLAYING GAMES
DOWNLOADING
CHATTING
TWITTER
E – COMMERCE
BLOGGING
SOCIAL NETWORKING
ENTERTAINMENT
E – GREETINGS
LISTEN SONGS
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23. WIRED NETWORKING
TECHNOLOGY media are
classified based on the kind of
materials used as :
1. Ethernet Twisted Pair
• Ethernet Twisted Pair
• Coaxial Cable
2. Coaxial Cable
3. Optic Fibre Cable
• Optic Fibre Cable
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24. Wireless or unguided media
means that there is no
physical path for the signal
to move. Hence
communication or
transmission is wireless. For
example :1. Bluetooth
2. Infrared
3. Wi-Fi
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25. WI-FI is a popular technology
that allows an electronic
device to exchange data
wirelessly over a computer
network. Wi-Fi is an
abbreviation for wireless
fidelity known as 802.11
wireless network.
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27. An operating system (OS) is a
collection of software that
manages computer
hardware resources and provides
common services for computer
programs. The operating system is an
essential component of the system
software in a computer system.
For example:
 MAC OS
LINUX
UNIX
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29. A word processor is an electronic
device or computer software
application that, as directed by the
user, performs word processing: the
composition, editing, formatting and
sometimes printing of any sort of
written material. Word processing can
also refer to
advanced shorthand techniques,
sometimes used in specialized
contexts with a specially
modified typewriter. The term was
coined at IBM's Boblingen , West
Germany Laboratory in the 1960s.
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30. A type of business software that
enables users to create highly
stylized images for slide shows and
reports. The software includes
functions for creating various types
of charts and graphs and for
inserting text in a variety of fonts.
Most
systems
enable
you
to import data from a spreadsheet
application to create the charts and
graphs.
Presentation graphics is often
called business graphics.
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