Intro Duct On to Computers

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HITEC UNIVERSITY TAXILA

ELECTRICAL ENGINEERING

Presented by

MUDASSIR MUKHTAR

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Introduction to

Computers

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The Computer Defined

Electronic device

Converts data into information

Modern computers are digital Two digits combine to make data

Older computers were analog A range of values make data

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Parts of the Computer System

Hardware

Software

DataUser

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Parts of the Computer System

Hardware Mechanical devices in computer

Thing that can be touched

Software Tell the computer what to do

Also called the program

Thing that can not be touched

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Parts of the Computer System

Data Pieces of information

Computer organize and present data

User Most important part

People operating the computer

Tell the computer what to do

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Information Processing Cycle

Steps followed to process data Input

Processing

Output

storage

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Category of Computer Users

C omputers

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Different types of Computers

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Different types of Computers

Desktop computers

The most common type

of computer

Sits on desk or floor

Perform variety of task

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Different types of Computers

Notebook computers

Small portable

computers

Weight between 3 to 8pounds

About 8 by 11 inches

Typically as powerful as

desktop

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Different types of Computers

Tablet computers

Newest development in

portable computers

Input is through a pen

Run specialized versions

of office products

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Different types of Computers

Mainframes

Use in large

organizations

User access through aterminal

Handle thousand of

users

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Different types of Computers

Super computers

The most powerful

computers made

Handle large andcomplex calculations

Process trillions of

calculations per second

Found in researchorganizations

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Essential Computer Hardware

Memory

Stores data or program

Random Access Memory(RAM)o Volatile

o Stores current data or program

Read Only Memory(ROM)o Permanent storage of program

o Hold the computer boot system

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Essential Computer Hardware

Input or output devices

Allows the users to interact

Input devices accept datao Keyboardo mouse

Output devices deliver datao Monitor

o

Speakero printer

Some devices are input as well as outputo Touch screens

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Essential Computer Hardware

Storage devices

Hold data and program permanently

Different from RAM

Magnetic storageo Floppy an d hard drive

o Use magnetic to access data

Optical storageo CD and DVD hard driveso Use laser to access data

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THANK YOU!

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