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Chapter 1 Overview. On-line materials. http://www.scsite.com/dc2011cp. Ch 4 Processor. Control Unit. Arithmetic Logic Unit (ALU). Instructions Data Information. Instructions Data Information. Ch 1 – Overview Ch 2 – Internet & WWW Ch 3 – Application Software Ch 8 – System Software.

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Chapter 1 overview

Chapter 1Overview

On-line materials

http://www.scsite.com/dc2011cp


Ch 4

Processor

Control Unit

Arithmetic Logic Unit (ALU)

InstructionsDataInformation

InstructionsDataInformation

Ch 1 – Overview

Ch 2 – Internet & WWW

Ch 3 – Application Software

Ch 8 – System Software

Control Unit

Arithmetic Logic Unit (ALU)

Memory

InputDevices

Ch 5

OutputDevices

Ch 6

Information

Data

StorageDevices

Ch 7


What is a computer
What Is a Computer?

Processes data into information

Data that is organized, meaningful, and useful

Acceptsdata

Raw facts, figures, and symbols

Produces and stores results

Stores for further use

Communicates to other users

and computers

  • Electronic device operating under the control of instructions stored in its own memory


Data

Raw facts, figures, and symbols

Information

Data that is organized, meaningful, and useful

What are data and information?


Information processing cycle

Process

Input

Output

Communication

Storage


What is hardware?

Hardware

electric, electronic and mechanical components



Computer hardware includes:

  • Input devices

  • Output devices

  • Processing hardware (System unit)

  • Storage devices (magnetic, optical, electronic)

  • Media devices

  • Communication (network) devices


What is an input device?

Hardware used to enter data and instructions

PC camera

microphone

keyboard

mouse

scanner

digital camera


What is an output device?

Hardware that conveys information to a user

monitor

speakers

printer


What is storage?

Storage media

  • Physical material on which data, instructions, and information are stored

Storage device

  • Records and retrieves items to and from a storage medium


Processor

Also called a Central Processing Unit (CPU)

The electronic component that interprets and carries out the basic instructions that operate the computer

Memory

Consists of electronic components that store instructions waiting to be executed and data

needed by those instructions


What is communications hardware?

Establishes a connection between two computers using a modem, cable, electric grid, telephone lines, wireless,and satellites

modem


What are networks?Collections of computers and devices connected together via communication devices and transmission media


  • What is the Internet?


Networks and the internet
Networks and the Internet

  • People use the Internet for a variety of reasons:


  • A social networking Web siteencourages members to share their interests, ideas, stories, photos, music, and videos with other users


What is the World Wide Web (WWW)?

Billions of documents, called Web pages, linked together on computers throughout the world

Web browser

Program used to access and view Web page

Search engine

Program used to select Web pages according to a criteria and evaluate them

Web site

Collection of related Web pages

Web page

Contains text, graphics, sound, or video and links to other Web pages


Consists of a seriesof instructions thattells the computerwhat to do and how to do it

Also called aprogram

  • What is software?


Software
Software

  • High-level language program (in C)

    swap intv[], int k){

    int temp;

    temp = v[k];

    v[k] = v[k+1];

    v[k+1] = temp; }

  • Assembly language program (for 80x86)

    pusha

    movah,2Ah

    int21h

    movbyte ptr Place,'0'

    cmpdh,9

    jaM1

    Machine code

    000000 00000 00101 0001000010000000

    000000 00100 00010 0001000000100000


What is software ( SW )?

Programs that control the operations of the computer – System Software

Programs that perform specific tasks for users – Application Software


  • Installing is the process of setting up software to work with the computer


What are the categories of computers?

Embedded Computers

Mobile Computers andMobile Devices

Personal Computers(desktop, laptop, notebook, tablet )

Game Consoles

Servers

Mainframes

Supercomputers


  • What is an embedded computer?


Embedded computers
Embedded Computers a larger product


Small a larger productenough to fit in one hand

Used by mobile employees such as meter readers and delivery people

  • What is ahandheld (mobile) computer?




A smart phone is a larger productan Internet-enabledtelephone that usuallyprovides PDA capabilities

  • What aresmart phones?


  • What a larger productis eBook?

  • Amazon Kindle


  • What a larger productis iPad? Who is he?

A tablet PC


  • What is a a larger productpersonal digital assistant (PDA)?

  • Provides personal organizer functions

    • Calendar

    • Appointment book

    • Address book

    • Calculator

    • Notepad


  • Designed so all of the components fit entirely on or under a desk or table


  • What is a a larger productnotebook computer?

  • Portable, small enough to fit on your lap

  • Also called a laptop computer


Mobile computing device designed for single-player or multiplayer video games

Xbox-360, Sony play station, Nintendo, Wee

  • What aregame consoles?


Servers
Servers multiplayer video

A server controls access to network resources and provides centralized storage


Mainframes
Mainframes multiplayer video

MainframeVery powerful, expensive computer that supports thousands of connected users


Supercomputers
Supercomputers multiplayer video

SupercomputerThe fastest, most powerful, most expensive computer. Used for applications requiring complex mathematical calculations


  • Computer system includes multiplayer video

    • Hardware - the physical components of a computer

    • Software – programs to perform specific tasks

  • Computer architecture (outside view – what it does?)

  • Computer organization (inside view – how it does?)

  • What has to be added to get an Information System?



Who are users of computers
Who are users of computers? multiplayer video

  • Home user

  • SOHO user

  • Mobile user

  • Power user

  • Enterprise user




Appreciating the gift
Appreciating the Gift multiplayer video

Crime fighting

Tools for disabled

Automation

Paperless technologies

Transportation (efficiency and safety)

More efficient government

Telecommuting

Management of economy

Fighting enemies


Appreciating the gift1
Appreciating the Gift multiplayer video

News, research

Distance education

Entertainment games, leisure

listen to music

Online shopping

Surfing WWW

Health management

Bank and invest

Watch movies


Computers add complexity multiplayer video

From natural to virtual

More consumerism

Public Safety

Impact on Labor Force

Impact on Environment


Weakening of local multiplayer video

communal life

Digital divide

Internet addiction

New kinds of crimes

Easy brainwashing


Advantages disadvantages of using computers
Advantages Disadvantages multiplayer video of Using Computers


  • Green computing multiplayer video involves reducing the electricity consumed and environmental waste generated when using a computer



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