Computer Iprint

8/8/2019 Computer Iprint

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What is a Computer?

Modern computersare electronic and

digital devices that:

Respond to a specific

set of instructions or

a program.

Execute the

prerecorded list of

instructions.


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An electronic device that helps people

perform different tasks.

An electronic device that follows a set ofinstructions so that it can manipulate or work on

data and provide useful information.

A machine that performs tasks, such as

mathematical calculations or electronic

communication under the control of a set of

instructions called program.


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A computer is an electronic device,operating under the control of instructions

(software) stored in its own memory unit,

that can accept data (input), manipulate

data (process), and produce information

(output) from the processing. Generally,

the term is used to describe a collection of

devices that function together as a system.


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Computers can perform four general

operations, which comprise the

information processing cycle.

Input

Process

Output

Storage


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Just about all computers, regardless of size, take raw data and change itinto information you can use. The process involves input, process, output,and storage (IPOS). For example:

You input data with some type of input device.

The computer processes it to turn it into information

You output the information to some type of output device. You store it for later retrieval.

Input, output, and processing devices grouped together represents acomputer system.

Input devices: keyboard, hard disk drive, floppy disk drive, scanner,modem, mouse, joystick, trackball, graphics tablet, touch display screen,

voice recognition devices, video input, and digital camera. Output devices: monitor, printer, hard disk drive, floppy disk drive.

Storage devices: hard drive, CDs, magnetic tape cartridge, WORM disks,Zip and Jaz diskettes, floppy diskettes, super floppies, photo CDs, andDVDs.


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Data Information

A collection of rawfacts, figures, &

symbols in a form

of:

Numbers

Words

Images Video

Sounds

Data that has beenorganized, is

meaningful and

useful

Can be sent tooutput

Printer

Web page

speaker

Can be stored

On disk


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Why Is A Computer So Powerful?

The ability to perform the information

processing cycle with amazing speed.

Reliability (low failure rate).

Accuracy.

Ability to store huge amounts of data and

information.

Ability to communicate with other

computers.


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The computer has the ability to performarithmetic operation like: addition, subtraction,multiplication, and division etc.

The computer can also perform logical

operations. The computer has the ability to store and

retrieve information because a computer hasstorage area called memory.

The computer has the ability to processinformation at a very high speed.

The computer can direct itself in apredetermined manner without human

intervention.


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A computers high-speed processing is

accompanied by high-accuracy results. Noother system can produce as much accuracyas the computer system.

Self-checking, the computer verifies the

accuracy of its own work by means of a paritycheck.

A computer can tirelessly perform the sameoperations millions of times in exactly the

same way without getting bored the way ahuman clerk would.

A computer has a program which contains aset of instructions used by the computer to

perform a specific task.


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Computers do not think for you, it

cannot generate information on its

own. Dependent to humans.

The computer cannot correct

inaccurate data.

The computer is subject to

breakdown.


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Computers come in various types and these

may be classified in various ways. Generally,

computers are classified according to:

Purpose - whether the computer is general

purpose or special purpose.

Type of data handled - whether the computer is

using analog, digital data or a combination ofboth.

Capacity- whether the volume of work that the

computer can handle is large or small.


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What Makes a Computer So Powerful?

Computers are not intelligent. They will do onlywhat we ask them to do.

Speed A computer can perform billions ofcalculations per second.

Reliability The electronic components aredependable.

Accuracy If data is entered correctly,computers generate error-free results.

Storage Computers can store and retrieveunlimited amounts of data and information.

Communications Computers can communicateand share resources with other computers.


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What is a COMPUTER? A collection of devices

and programs thatfunction together as asystem.

Electronic devices

Contains

Memory

Instructions

Data is input Processes data according

to rules

Outputs information

Stores results


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Thank you for your participation inthis workshop. We hope you foundit helpful. Do not forget to completean Academic Enrichment Summary.

If you are viewing this workshop viathe internet please come by theStudent Support Services office tocomplete an Academic EnrichmentSummary or you may click on the

link in the instruction box on theWorkshops page and print one outor e-mail it to [email protected] that we may document yourparticipation. Handouts available

upon request. EXIT

Computer Iprint

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