MELJUN CORTES Computer Information Processing Chapter 1 With Notes

7/31/2019 MELJUN CORTES Computer Information Processing Chapter 1 With Notes

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CCT101: Chapter 1

Introduction to Computers


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OBJECTIVESOBJECTIVES

Define the term computer Identify the components of a computer

Explain why a computer is a powerful tool

Explain the purpose of a network

Discuss the uses of the Internet and the World WideWeb

Describe the categories of computers and their uses


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WHAT IS A COMPUTER AND WHAT DOES IT

DO?

WHAT IS A COMPUTER AND WHAT DOES IT

DO?

An electronic machine, operating under the control ofinstructions stored in its own memory

That can accept data (input), manipulate data according tospecified rules (process), produce results (output), and store

the results for future use.


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Input Devices

Output Devices

System Unit

Storage Devices

Communications Devices

THE COMPONENTS OF A COMPUTERTHE COMPONENTS OF A COMPUTER


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WHY IS A COMPUTER SO POWERFUL?WHY IS A COMPUTER SO POWERFUL?

Speed

Reliability

Accuracy Storage

Communications


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COMPUTER SOFTWARECOMPUTER SOFTWARE

System software

A series of instructions that tells the hardware of a computer how to

perform tasks

Operating system

Utility program User Interface

Application software

Consists of programs designed to perform specific tasks for users


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Application Software

Packaged software

Custom software

Shareware

Freeware Public-domain software


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NETWORKS AND THE INTERNETNETWORKS AND THE INTERNET

Network

Sharing resources

Local area network - LAN

Wide area network


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NETWORKS AND THE INTERNETNETWORKS AND THE INTERNET

Internet

E-mail

Information

Shopping

Meeting people Entertainment

Web page

Web site

Web browser


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Personal computers

Minicomputers

Mainframe computers

Supercomputers

CATEGORIES OF COMPUTERSCATEGORIES OF COMPUTERS


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Can perform all of its input, processing, output, and storage

activities by itself

Desktop Computers

Tower model

Workstation

Stand-alone

Server

Network computers

PERSONAL COMPUTERSPERSONAL COMPUTERS


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Portable Computers

Laptop computers

Handheld computers

Pen computers

Office on your arm video

PERSONAL COMPUTERSPERSONAL COMPUTERS


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Support up to 4,000 users

Often connected via a terminal

MINICOMPUTERSMINICOMPUTERS


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Large, expensive, very powerful computer that can handle

hundreds or thousands of connected users

MAINFRAME COMPUTERSMAINFRAME COMPUTERS


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Fastest, most powerful computer

Able to process more than 64 billion instructions per second

SUPERCOMPUTERSSUPERCOMPUTERS


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Home User

Home software

Software for children

Home use of the web Computer family video

EXAMPLES OF COMPUTER USAGEEXAMPLES OF COMPUTER USAGE


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Small Business User

Desktop users



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Small Business User

Desktop users

Productivity software

Specialized software Web usage

Small business web sites



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Mobile User

Many types of mobile users

Presentations

Docking station



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Large Business User

Order entry

PDAs for organization

Large business web site Kiosk



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Power User

Engineers, architects, desktop publishers, graphic artists

Specialized software


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MELJUN CORTES Computer Information Processing Chapter 1 With Notes