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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

slide2
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
slide4
Data

Raw facts, figures, and symbols

Information

Data that is organized, meaningful, and useful

What are data and information?

slide5
Information processing cycle

Process

Input

Output

Communication

Storage

slide6
What is hardware?

Hardware

electric, electronic and mechanical components

slide8
Computer hardware includes:
  • Input devices
  • Output devices
  • Processing hardware (System unit)
  • Storage devices (magnetic, optical, electronic)
  • Media devices
  • Communication (network) devices
slide10
What is an input device?

Hardware used to enter data and instructions

PC camera

microphone

keyboard

mouse

scanner

digital camera

slide11
What is an output device?

Hardware that conveys information to a user

monitor

speakers

printer

slide12
Holds data, instructions, and information for future use

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
slide13
What is the system unit?

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

slide14
What is communications hardware?

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

modem

slide15
What are networks?Collections of computers and devices connected together via communication devices and transmission media
slide16
Worldwide collection of networks that connects millions of businesses, government agencies, educational institutions, and individuals
  • What is the Internet?
networks and the internet
Networks and the Internet
  • People use the Internet for a variety of reasons:
slide18
A social networking Web siteencourages members to share their interests, ideas, stories, photos, music, and videos with other users
slide19
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

slide20
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

slide22
What is software ( SW )?

Programs that control the operations of the computer – System Software

Programs that perform specific tasks for users – Application Software

slide24
What are the categories of computers?

Embedded Computers

Mobile Computers andMobile Devices

Personal Computers(desktop, laptop, notebook, tablet )

Game Consoles

Servers

Mainframes

Supercomputers

slide25
A special-purpose computer that functions as a component in a larger product
  • What is an embedded computer?
slide27
Small enough to fit in one hand

Used by mobile employees such as meter readers and delivery people

  • What is ahandheld (mobile) computer?
slide30
A smart phone isan Internet-enabledtelephone that usuallyprovides PDA capabilities
  • What aresmart phones?
slide31
What is eBook?
  • Amazon Kindle
slide33
What is apersonal digital assistant (PDA)?
  • Provides personal organizer functions
    • Calendar
    • Appointment book
    • Address book
    • Calculator
    • Notepad
slide34
What is adesktop computer?
  • Designed so all of the components fit entirely on or under a desk or table
slide35
What is anotebook computer?
  • Portable, small enough to fit on your lap
  • Also called a laptop computer
slide36
Mobile computing device designed for single-player or multiplayer video games

Xbox-360, Sony play station, Nintendo, Wee

  • What aregame consoles?
servers
Servers

A server controls access to network resources and provides centralized storage

mainframes
Mainframes

MainframeVery powerful, expensive computer that supports thousands of connected users

supercomputers
Supercomputers

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

slide40
Computer system includes
    • 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?
  • Home user
  • SOHO user
  • Mobile user
  • Power user
  • Enterprise user
appreciating the gift
Appreciating the Gift

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

News, research

Distance education

Entertainment games, leisure

listen to music

Online shopping

Surfing WWW

Health management

Bank and invest

Watch movies

slide47
Computers add complexity

From natural to virtual

More consumerism

Public Safety

Impact on Labor Force

Impact on Environment

slide48
Weakening of local

communal life

Digital divide

Internet addiction

New kinds of crimes

Easy brainwashing

slide50
Green computinginvolves reducing the electricity consumed and environmental waste generated when using a computer
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