intro to comp concepts (2)

8/8/2019 Intro to Comp Concepts (2)

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What is Computer

A programmable electronic device, which inputs data,

processes it, gives information according to theinstructions provided.


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DataComputer System

PROCESSINGInformation

Example:

Marks of 60 students : Data (Input)

To find the highest scorer : Process

The name of the topper : Information (Output)


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Need For Computer LiteracyIn most places of business, a computer is standard.

Bank - to look up account information. Library - card catalog to use a computerized database. Job Hunt -It will help in getting a job and it will help you

advance in your career. Computer literacy does not mean you need to know how touse every single piece of software.

It does not mean you need to know how to write programs ornetwork of computers.

You just need to know some basics how to save and opena file, how to use a word processing program, and how tosend and receive email.

Having some sort of level of comfort around computers ratherthan a look of fear.


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Application of ComputerSystem

Today computer is used almost in every field.

For example. It is used in

Banks

Railways

Hospitals

Airports

Schools/Collegesand many more..


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Components of ComputerSystem

What is the difference between the computer andcomputer system?

Computer refers to the actual physical electronic device. Whereas thecomputer system includes following:

1. Hardware any physical component which wecan touch/see.

2. Software data contained in the hardware,similar to songs in audio cassette .

3. Live ware (user) the computer operator


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Computer Hardware


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Computer Hardware

We can classify the computer hardware as:

1. Input Devices those devices which are used for enteringdata to the computer. Example: Keyboard, Mouse, Scanner, Webcamera etc.

2. Output Devices those devices on which we obtaininformation out from the computer. Example: Monitor, Printer.

3. Central Processing Unit central unit which does all the

processing, accepts data from input device and send processeddata to the output device.


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A Basic Model of a Computer

Control Unit

ALU

Main Memory

Auxiliary Storage

Disks, FDD, CD-ROM/RW

Input Output

UnitInterprets stored

Instructions,

Issues

Commands to

All the elements

Of theComputer

Data /Instructions Results of Processing


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Have you seenCPU? If so how it looks like?

Ans: It looks like BOX

No,

You are talking about cabinet, which includes following:

Processor

RAM/ROM

Floppy Disk Drive

Hard Disk Drive

Optical Drive

Power Supply Unit

Mother Board

Ports


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Computer Software


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Types ofComputer Software

Computer software can be categorized into following two categories:1. System Software: includes those software that help in better utilization

hardware resources.

Example Operating System, Compiler, Disk Drivers etc.

2. Application Software: includes those software that helps in performing

a particular task such as creating a document, preparing a presentation.

These are general purpose software's.

Example: Ms-Word, Excel, Power Point, etc.

3. Utility Software: includes those software that generally comes along

with operating system used to perform basic activities.Example: Disk Format Utility, Disk Defragmenter Utility, etc.

4. Customized Software : includes software which are specially designed

for a particular group of users.

Example: Software for a bank, hospital, business organization, etc.

intro to comp concepts (2)

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