Introduction to Computer Concepts (ITEC3)

8/3/2019 Introduction to Computer Concepts (ITEC3)

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What Is Computer?

An electronic machine, operatingunder the control of instructionsstored in its own memory.

isa programmable machine designed to sequentially andautomatically carry out a

sequence of arithmetic or logicaloperations.

Prepaired by: Beverly R. de Guzman 1


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FUNCTIONS OF COMPUTER

accepts data

manipulates the data according

to specified rules produces results

stores the results

for future use



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COMPUTERARCHITECTURE


INPUT DEVICE

PROCESSOR

OUTPUT DEVICE


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INPUT DEVICES


keyboard

mouse

pointing sticks

pen inputs

touch screen

scanner

microphone

joysticks

digitizer

graphics tablet

light pen touch pad


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KEYBOARD



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KEYBOARD



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KEYBOARD



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KEYBOARD



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MOUSE



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PROCESSOR

CENTRAL PROCESSING UNITINTERNAL MEMORY

Random Access MemoryRead-Only Memory

EXTERNAL MEMORYFloppy DiskCompact DiscDigital Video Disc

Flash DiskMemory Card


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OUTPUT DEVICES


printer

fax

projector headphones

speaker

monitor

plotter

synthesizers


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PLOTTER



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CLASSIFICATIONSOF A COMPUTER


GENERAL-PURPOSE COMPUTERS

These machines have thecapability of dealing with the

variety of different problems and

are able to act in response to

programs created to meet

different needs.


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SPECIAL-PURPOSE COMPUTERS

It is designed to performspecific tasks. Have the capability

of performing just one task. They

are frequently referred to as

dedicated.


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ANALOG COMPUTERS

used for scientific, engineeringand process control purposes. It

deal with quantities that are

continuously variable, they

approximate results.


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DIGITAL COMPUTERS

Is a machine that specializes incounting. These are used for both

business data processing and

scientific purposes since digital

computation result in greater

accuracy.


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HYBRID COMPUTERS

Combines the measuring

capabilities of the analogcomputer and the logical and

control capabilities of digital

computers. It offers an efficient and

economical method of working out

special types problems in scienceand various areas of engineering.


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CATEGORIES OFCOMPUTERS


SUPERCOMPUTERS

MAINFRAME

MINICOMPUTERS

MICROCOMPUTERS


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COMPUTERCOMPONENTS


HARDWARE

SOFTWARE

PEOPLEWARE

DATAWARE


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FIVE CAPABILITIESOF A COMPUTER


SPEED

it processes data at a highspeed.

ACCURACY

The computer does not do any

mistake. If the wrong instructions or

data are supplied then the result

produced by the computer is wrong.

There is a term which describesaccuracy of the computer and that

term is GIGO.


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STORAGE CAPACITY

The computer can store huge

amount of data and information

for the current and future uses.

DILIGENCE

It can perform the same task

repeatedly without losing accuracyand speed.


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VERSATILE

The computer can be used for

doing different types of task. One

can use the computer for data

processing, video editing,

preparing documents, etc.


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LIMITATIONSOF A COMPUTER


PROGRAMMED BY HUMAN

Without a program, computer is

nothing. A program is a set of

instructions.

THINKING

The concept of artificial

intelligence shows that the computer

can think.


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SELF CARE

A computer is dependent still

to human beings for this purpose.

RETRIEVAL OF MEMORY

A human mind can think

randomly which a computer

machine can not.


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FEELINGS

A computer can not meet

human in respect of relations.


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HISTORY AT A GLANCE


1st Generation Computers

2nd Generation Computers

3rd Generation Computers

4th Generation Computers5th Generation Computers

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Introduction to Computer Concepts (ITEC3)

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