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Chapter 1
Introduction to
Computers
Chapter 1 Objectives
Explain the importance
of computer literacy
Define the term computer
Identify the components
of a computer
Explain why a computer
is a powerful tool
Differentiate among the
various types of software
Discuss the uses of the Internet
and the World Wide Web
Describe the categories of
computers and their uses
Explain the purpose
of a network
Identify the various types
of computer users
Understand how a user
can be a Web publisher
p. 1.2
Next
p. 1.2 Fig. 1-1
The Digital
Revolution
Where can you find computers?
• Computers are everywhere
Next
The Digital
Revolution
What is computer literacy?
• Knowledge and understanding of
computers and their uses
p. 1.4
Next
What Is a Computer?
How is a computer
defined?
• Electronic machine
operating under the
control of instructions
stored in its own
memory
–Accepts data
–Manipulates data
–Produces results
–Stores results
p. 1.4
Next
Data
Raw facts,
figures, and
symbols
Information
Data that is
organized,
meaningful,
and useful
What Is a Computer?
p. 1.4 Fig. 1-2
Next
What Is a Computer?
Who is a user?
• Person who
communicates
with a computer
or uses the
information it
generates
p. 1.4
Next
Software
Instructions that
tell hardware how
to perform tasks
Hardware
Electronic and
mechanical equipment
What Is a Computer?
What are hardware and software?
p. 1.4
Next
Input
Output
Storage
Communication
What is the
information
processing
cycle?
What Is a Computer?
Process
p. 1.5
Next
The Components of a
Computer
What are common computer hardware components?
printer
scanner
speaker
PC camera
microphone
digital camera
system unit
keyboard
modem
monitor
mouse
p. 1.5 Fig. 1-3
Next
speaker
The Components of a
Computer
What is an input device?
• Hardware used to enter data and instructions
scanner
microphone
keyboard
mouse
PC camera
digital
camera
p. 1.5 Fig. 1-3
Next
The Components of a
Computer
What is an output device?
• Hardware that conveys information to a user
printer
monitor speakers
p. 1.6 Fig. 1-3
Next
The Components of a
Computer
What is the system unit?
• Box-like device
containing electronic
components
connected to
motherboard
• Also called a chassis hard
disk
drive
(inside
case)
CD-RW
drive
CD-ROM
or DVD-
ROM
drive
Zip®
drive
floppy
disk
drive
p. 1.6 Fig. 1-3
Next
Memory
• Temporary holding place for data
and instructions
The Components of a
Computer
What are two main components on the
motherboard?
Central Processing Unit
(CPU)
• Also called a processor
• Carries out instructions that tell
computer what to do
p. 1.6
Next
The Components of a
Computer
What is a chip?
• Device with microscopic pathways that
carry electrical currents
• Attaches to
motherboard
processor chip
packaging
memory
chip
p. 1.6 Fig. 1-4
Next
The Components of a
Computer
What is storage?
• Holds data, instructions, and information for future use
Storage
Device
• Records and retrieves
items to and from
a storage medium
Storage
Medium
• Physical material
on which data,
instructions, and
information are
stored
p. 1.7
Next
The Components of a
Computer
CD-RW drive
hard disk
drive
CD-ROM or
DVD-ROM
drive
ZIP® drive
floppy
disk
drive
What are common storage devices or drives?
p. 1.7 Fig. 1-3
Next
The Components of a
Computer
What is a floppy disk?
• Thin, circular,
flexible disk
enclosed in
rigid plastic
• A Zip® disk is a
higher capacity disk
p. 1.7 Fig. 1-5
Next
The Components of a
Computer
What is a hard disk?
• Provides much greater
storage capacity than
a floppy disk
removable
hard disk
self-contained
hard disk
p. 1.7 Fig. 1-6 & 7
Next
The Components of a
Computer
What is a compact disc?
• Portable storage
media
–CD-ROM
–CD-RW
–DVD-ROM
–DVD+RW
p. 1.8 Fig. 1-8
Next
The Components of a
Computer
What is miniature storage media?
• Portable, thin, credit card size memory
• Used in digital cameras and
handheld computers
Memory card
miniature
storage media
p. 1.8 Fig. 1-9
Next
The Components of a
Computer
What is a communications device?
• Establishes a connection between two
computers using cable, telephone lines,
and satellites
• One type is a modem
modem
p. 1.8 Fig. 1-3
Next
Speed
Why Is a Computer
So Powerful?
What makes a computer powerful?
Storage
Reliability
Accuracy Communications
p. 1.8
Next
Computer Software
What is a computer program?
• A series of instructions that tells the computer
what to do
p. 1.10
Next
What happens when you run a program from
a CD-ROM?
Computer Software
Step 1
Step 1: Insert the
CD-ROM into the
CD-ROM drive
Step 1
Step 2
Step 2: Instruct
the computer to
run the program
Step 2
Step 3
Step 1
Step 3: The
program
executes
p. 1.11 Fig. 1-12
Next
Computer Software
What is system software?
• Programs that control the operations of the
computer and its devices
Operating
System (OS)
Utility
Programs
p. 1.12
Next
Computer Software
What is the user
interface?
• Controls how you
enter data and
commands and how
information displays
p. 1.12
Next
Computer Software
What is a graphical user interface (GUI)?
• Uses visual images such as icons
 Icon represents
program,
instruction, or
some other
object
icons
icons
p. 1.12 Fig. 1-13
Next
Computer Software
What is application software?
• Programs that perform specific tasks for users
Word
processing
software
Spreadsheet
software
Database
software
Presentation
graphics
software
Suite
Popular software applications
bundled together as a single
unit
Office XP
Spreadsheet Database
Presentation
graphics
Word
processing
p. 1.13
Next
Freeware
• Software provided
at no cost
• Copyrighted
• Cannot resell it
as your own
Public-Domain
Software
• Freeware donated
for public use
• No copyright
restrictions
Computer Software
Shareware
• Copyrighted software
distributed free for trial
period
• Send payment to
developer on honor
system
p. 1.14
Next
What are
shareware,
freeware,
public-domain
software?
Computer Software
What is an application service provider (ASP)?
Third-party company that
manages and distributes
software and services
on the Internet
You can run the
programs from the
Internet
Both free and
paid ASPs
p. 1.15
Next
Computer Software
Who designs and writes software?
• Systems analyst
• Programmer
p. 1.15
Next
Communications Device
• Modem
Networks and the
Internet
What is a network?
• Collection of computers and devices
connected together
Communications Media
• Cables
• Telephone lines
• Cellular radio
• Satellites
p. 1.16
Next
Networks and the
Internet
What are the reasons to network?
Software
programs
Hardware
devices
Data
Information
To save
time
and
money
To share
resources
p. 1.17
Next
Networks and the
Internet
• Network that
connects
computers in
a limited
geographic area
What is a local area network (LAN)?
p. 1.16 Fig. 1-16
Next
Networks and the
Internet
What is a wide area network (WAN)?
• Network that covers large geographical area
p. 1.16 Fig. 1-17
Next
Networks and the
Internet
What is the Internet?
• Worldwide
collection of
networks that
links millions of
computers
together
p. 1.17
Next
 E-mail
 Information
 Shopping
 Meeting people
 Entertainment
Networks and the
Internet
Why do users access the Internet?
p. 1.17 Fig. 1-18
Next
Networks and the
Internet
How do users connect to the Internet?
Online Service
Provider (OSP)
Provides access to
the Internet and
specialized
services
(AOL and MSN)
Internet Service
Provider (ISP)
Provides access to
the Internet
p. 1.18
Next
Networks and the
Internet
What is the World Wide Web (WWW)?
• Billions of documents, called Web pages, linked
together on computers throughout the world
Web page
Contains text,
graphics, sound, or
video and links to
other Web pages
Web site
Collection of
related Web
pages
Web browser
Program used to
access and view
Web pages
p. 1.18
Next
Networks and the
Internet
How do you connect to Internet and display a
Web page?
4: The Web browser locates
the Web site and displays the
Web page
3: Enter the address
of the Web site
2: Use browser such as
Internet Explorer to display a
Web page
1: Use computer to make a local
telephone call to an online service
provider
p. 1.18 Fig. 1-19
Next
Categories of
Computers
What are the categories of computers?
p. 1.19 Fig. 1-20
Next
Personal Computers
What are the two most popular series of personal
computers?
p. 1.19 Fig. 1-21 & 22
PC and compatibles use the
Windows operating system
Apple Macintosh uses
the Macintosh operating
system (Mac OS)
Next
Personal Computers
What is a notebook computer?
• Portable, small
enough to fit
on your lap
• Also called a
laptop
• Generally more
expensive than
a desktop
computer
p. 1.22 Fig. 1-26
Next
Handheld Computers
What is a handheld computer?
• Small computer
that fits in your
hand
• Also called a
palmtop or pocket
computer
p. 1.23 Fig. 1-27
Next
Handheld Computers
How do you input data with a
handheld computer?
 Keyboard
 Stylus
 Speech recognition
 Handwriting
recognition
p. 1.23 Fig. 1-28
Next
Handheld Computers
What is a personal digital assistant (PDA)?
• Provides personal
organizer functions
– Calendar
– Appointment book
– Address book
– Calculator
– Notepad
p. 1.23
Next
Handheld Computers
What are Web-enabled handheld computers?
• Allow wireless Internet access
Web-enabled
two-way pager
Web-enabled
cellular telephone
Web-enabled
handheld
computer
p. 1.24 Fig. 1-29
Next
Internet Appliances
What is an Internet appliance?
• Computer whose
main purpose is
to connect to
Internet from
home
• Web TV is one
example
p. 1.24 Fig. 1-30
Next
1. Hardware
2. Software
1. Hardware
3. Data
1. Hardware
2. Software
4a. People (IT personnel)
1. Hardware
2. Software
3. Data
4b. People (users)
1. Hardware
2. Software
3. Data
4a. People (IT personnel)
5. Procedures
1. Hardware
2. Software
3. Data
4a. People (IT personnel)
4b. People (users)
Elements of an
Information System
What are
information system
elements?
• Hardware
• Software
• Data
• People
• Procedures
p. 1.27 Fig. 1-35
Next
Large Business
Examples of Computer
Usage
What are five categories of computer users?
Home
Mobile
Small Office/Home Office
Power
p. 1.28 Fig. 1-36
Next
p. 1.29 Fig. 1-37
Examples of Computer
Usage
What software is available for a home user?
personal finance
management
Next
entertainment
Web access
communications
Examples of Computer
Usage
What software is available for a small
office/home office (SOHO) user? Web access
spreadsheet
 Local area
network (LAN)
 Productivity
software
 Specialty
software
 Web usage
 E-mail
 E-commerce
p. 1.31 Fig. 1-39
Next
Examples of Computer
Usage
What is available for a mobile user?
 Hardware
• Notebook computers
• Handheld computers
• Web-enabled cellular
telephones
 Software
• Productivity
• Presentation
p. 1.32 Fig. 1-40
Next
Examples of Computer
Usage
What are the needs of the
large business user?
p. 1.33 Fig. 1-41
Next
• Network
• Sales management
• Accounting
• Desktop publishing
• Information systems
department
• Productivity software
• Scheduling
• Web access
• Telecommuting
Examples of Computer
Usage
What are the needs of a power user?
 Speed and large
amounts of storage
 Types of power users
• Engineers
• Architects
• Desktop publishers
• Graphic artists
p. 1.35 Fig. 1-45
Next
 Family information
 Resume online
 Electronic storefront
 Photo communities
Computer User as a
Web Publisher
Why do users publish Web pages?
p. 1.36 Fig. 1-46
Next
Summary of Introduction
to Computers
• The digital revolution
• What is a computer?
• The components of a computer
• Why is a computer so powerful?
• Computer software
• Networks and the Internet
• Categories of computers
• Personal computers
Next (continued)
Summary of Introduction
to Computers (cont’d)
• Handheld computers
• Internet appliances
• Elements of an information system
• Examples of computer usage
• Computer user as a Web publisher
Next
Chapter 1 Complete

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Chap 01- Introduction to Computers.ppt

  • 2. Chapter 1 Objectives Explain the importance of computer literacy Define the term computer Identify the components of a computer Explain why a computer is a powerful tool Differentiate among the various types of software Discuss the uses of the Internet and the World Wide Web Describe the categories of computers and their uses Explain the purpose of a network Identify the various types of computer users Understand how a user can be a Web publisher p. 1.2 Next
  • 3. p. 1.2 Fig. 1-1 The Digital Revolution Where can you find computers? • Computers are everywhere Next
  • 4. The Digital Revolution What is computer literacy? • Knowledge and understanding of computers and their uses p. 1.4 Next
  • 5. What Is a Computer? How is a computer defined? • Electronic machine operating under the control of instructions stored in its own memory –Accepts data –Manipulates data –Produces results –Stores results p. 1.4 Next
  • 6. Data Raw facts, figures, and symbols Information Data that is organized, meaningful, and useful What Is a Computer? p. 1.4 Fig. 1-2 Next
  • 7. What Is a Computer? Who is a user? • Person who communicates with a computer or uses the information it generates p. 1.4 Next
  • 8. Software Instructions that tell hardware how to perform tasks Hardware Electronic and mechanical equipment What Is a Computer? What are hardware and software? p. 1.4 Next
  • 10. The Components of a Computer What are common computer hardware components? printer scanner speaker PC camera microphone digital camera system unit keyboard modem monitor mouse p. 1.5 Fig. 1-3 Next speaker
  • 11. The Components of a Computer What is an input device? • Hardware used to enter data and instructions scanner microphone keyboard mouse PC camera digital camera p. 1.5 Fig. 1-3 Next
  • 12. The Components of a Computer What is an output device? • Hardware that conveys information to a user printer monitor speakers p. 1.6 Fig. 1-3 Next
  • 13. The Components of a Computer What is the system unit? • Box-like device containing electronic components connected to motherboard • Also called a chassis hard disk drive (inside case) CD-RW drive CD-ROM or DVD- ROM drive Zip® drive floppy disk drive p. 1.6 Fig. 1-3 Next
  • 14. Memory • Temporary holding place for data and instructions The Components of a Computer What are two main components on the motherboard? Central Processing Unit (CPU) • Also called a processor • Carries out instructions that tell computer what to do p. 1.6 Next
  • 15. The Components of a Computer What is a chip? • Device with microscopic pathways that carry electrical currents • Attaches to motherboard processor chip packaging memory chip p. 1.6 Fig. 1-4 Next
  • 16. The Components of a Computer What is storage? • Holds data, instructions, and information for future use Storage Device • Records and retrieves items to and from a storage medium Storage Medium • Physical material on which data, instructions, and information are stored p. 1.7 Next
  • 17. The Components of a Computer CD-RW drive hard disk drive CD-ROM or DVD-ROM drive ZIP® drive floppy disk drive What are common storage devices or drives? p. 1.7 Fig. 1-3 Next
  • 18. The Components of a Computer What is a floppy disk? • Thin, circular, flexible disk enclosed in rigid plastic • A Zip® disk is a higher capacity disk p. 1.7 Fig. 1-5 Next
  • 19. The Components of a Computer What is a hard disk? • Provides much greater storage capacity than a floppy disk removable hard disk self-contained hard disk p. 1.7 Fig. 1-6 & 7 Next
  • 20. The Components of a Computer What is a compact disc? • Portable storage media –CD-ROM –CD-RW –DVD-ROM –DVD+RW p. 1.8 Fig. 1-8 Next
  • 21. The Components of a Computer What is miniature storage media? • Portable, thin, credit card size memory • Used in digital cameras and handheld computers Memory card miniature storage media p. 1.8 Fig. 1-9 Next
  • 22. The Components of a Computer What is a communications device? • Establishes a connection between two computers using cable, telephone lines, and satellites • One type is a modem modem p. 1.8 Fig. 1-3 Next
  • 23. Speed Why Is a Computer So Powerful? What makes a computer powerful? Storage Reliability Accuracy Communications p. 1.8 Next
  • 24. Computer Software What is a computer program? • A series of instructions that tells the computer what to do p. 1.10 Next
  • 25. What happens when you run a program from a CD-ROM? Computer Software Step 1 Step 1: Insert the CD-ROM into the CD-ROM drive Step 1 Step 2 Step 2: Instruct the computer to run the program Step 2 Step 3 Step 1 Step 3: The program executes p. 1.11 Fig. 1-12 Next
  • 26. Computer Software What is system software? • Programs that control the operations of the computer and its devices Operating System (OS) Utility Programs p. 1.12 Next
  • 27. Computer Software What is the user interface? • Controls how you enter data and commands and how information displays p. 1.12 Next
  • 28. Computer Software What is a graphical user interface (GUI)? • Uses visual images such as icons  Icon represents program, instruction, or some other object icons icons p. 1.12 Fig. 1-13 Next
  • 29. Computer Software What is application software? • Programs that perform specific tasks for users Word processing software Spreadsheet software Database software Presentation graphics software Suite Popular software applications bundled together as a single unit Office XP Spreadsheet Database Presentation graphics Word processing p. 1.13 Next
  • 30. Freeware • Software provided at no cost • Copyrighted • Cannot resell it as your own Public-Domain Software • Freeware donated for public use • No copyright restrictions Computer Software Shareware • Copyrighted software distributed free for trial period • Send payment to developer on honor system p. 1.14 Next What are shareware, freeware, public-domain software?
  • 31. Computer Software What is an application service provider (ASP)? Third-party company that manages and distributes software and services on the Internet You can run the programs from the Internet Both free and paid ASPs p. 1.15 Next
  • 32. Computer Software Who designs and writes software? • Systems analyst • Programmer p. 1.15 Next
  • 33. Communications Device • Modem Networks and the Internet What is a network? • Collection of computers and devices connected together Communications Media • Cables • Telephone lines • Cellular radio • Satellites p. 1.16 Next
  • 34. Networks and the Internet What are the reasons to network? Software programs Hardware devices Data Information To save time and money To share resources p. 1.17 Next
  • 35. Networks and the Internet • Network that connects computers in a limited geographic area What is a local area network (LAN)? p. 1.16 Fig. 1-16 Next
  • 36. Networks and the Internet What is a wide area network (WAN)? • Network that covers large geographical area p. 1.16 Fig. 1-17 Next
  • 37. Networks and the Internet What is the Internet? • Worldwide collection of networks that links millions of computers together p. 1.17 Next
  • 38.  E-mail  Information  Shopping  Meeting people  Entertainment Networks and the Internet Why do users access the Internet? p. 1.17 Fig. 1-18 Next
  • 39. Networks and the Internet How do users connect to the Internet? Online Service Provider (OSP) Provides access to the Internet and specialized services (AOL and MSN) Internet Service Provider (ISP) Provides access to the Internet p. 1.18 Next
  • 40. Networks and the Internet What is the World Wide Web (WWW)? • Billions of documents, called Web pages, linked together on computers throughout the world Web page Contains text, graphics, sound, or video and links to other Web pages Web site Collection of related Web pages Web browser Program used to access and view Web pages p. 1.18 Next
  • 41. Networks and the Internet How do you connect to Internet and display a Web page? 4: The Web browser locates the Web site and displays the Web page 3: Enter the address of the Web site 2: Use browser such as Internet Explorer to display a Web page 1: Use computer to make a local telephone call to an online service provider p. 1.18 Fig. 1-19 Next
  • 42. Categories of Computers What are the categories of computers? p. 1.19 Fig. 1-20 Next
  • 43. Personal Computers What are the two most popular series of personal computers? p. 1.19 Fig. 1-21 & 22 PC and compatibles use the Windows operating system Apple Macintosh uses the Macintosh operating system (Mac OS) Next
  • 44. Personal Computers What is a notebook computer? • Portable, small enough to fit on your lap • Also called a laptop • Generally more expensive than a desktop computer p. 1.22 Fig. 1-26 Next
  • 45. Handheld Computers What is a handheld computer? • Small computer that fits in your hand • Also called a palmtop or pocket computer p. 1.23 Fig. 1-27 Next
  • 46. Handheld Computers How do you input data with a handheld computer?  Keyboard  Stylus  Speech recognition  Handwriting recognition p. 1.23 Fig. 1-28 Next
  • 47. Handheld Computers What is a personal digital assistant (PDA)? • Provides personal organizer functions – Calendar – Appointment book – Address book – Calculator – Notepad p. 1.23 Next
  • 48. Handheld Computers What are Web-enabled handheld computers? • Allow wireless Internet access Web-enabled two-way pager Web-enabled cellular telephone Web-enabled handheld computer p. 1.24 Fig. 1-29 Next
  • 49. Internet Appliances What is an Internet appliance? • Computer whose main purpose is to connect to Internet from home • Web TV is one example p. 1.24 Fig. 1-30 Next
  • 50. 1. Hardware 2. Software 1. Hardware 3. Data 1. Hardware 2. Software 4a. People (IT personnel) 1. Hardware 2. Software 3. Data 4b. People (users) 1. Hardware 2. Software 3. Data 4a. People (IT personnel) 5. Procedures 1. Hardware 2. Software 3. Data 4a. People (IT personnel) 4b. People (users) Elements of an Information System What are information system elements? • Hardware • Software • Data • People • Procedures p. 1.27 Fig. 1-35 Next
  • 51. Large Business Examples of Computer Usage What are five categories of computer users? Home Mobile Small Office/Home Office Power p. 1.28 Fig. 1-36 Next
  • 52. p. 1.29 Fig. 1-37 Examples of Computer Usage What software is available for a home user? personal finance management Next entertainment Web access communications
  • 53. Examples of Computer Usage What software is available for a small office/home office (SOHO) user? Web access spreadsheet  Local area network (LAN)  Productivity software  Specialty software  Web usage  E-mail  E-commerce p. 1.31 Fig. 1-39 Next
  • 54. Examples of Computer Usage What is available for a mobile user?  Hardware • Notebook computers • Handheld computers • Web-enabled cellular telephones  Software • Productivity • Presentation p. 1.32 Fig. 1-40 Next
  • 55. Examples of Computer Usage What are the needs of the large business user? p. 1.33 Fig. 1-41 Next • Network • Sales management • Accounting • Desktop publishing • Information systems department • Productivity software • Scheduling • Web access • Telecommuting
  • 56. Examples of Computer Usage What are the needs of a power user?  Speed and large amounts of storage  Types of power users • Engineers • Architects • Desktop publishers • Graphic artists p. 1.35 Fig. 1-45 Next
  • 57.  Family information  Resume online  Electronic storefront  Photo communities Computer User as a Web Publisher Why do users publish Web pages? p. 1.36 Fig. 1-46 Next
  • 58. Summary of Introduction to Computers • The digital revolution • What is a computer? • The components of a computer • Why is a computer so powerful? • Computer software • Networks and the Internet • Categories of computers • Personal computers Next (continued)
  • 59. Summary of Introduction to Computers (cont’d) • Handheld computers • Internet appliances • Elements of an information system • Examples of computer usage • Computer user as a Web publisher Next Chapter 1 Complete