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Chapter 1 Introduction to Computers CHAPTER 1 OBJECTIVES Recognize the importance of computer literacy Identify the components of a computer Discuss the uses of the Internet and World Wide Web Identify the types of software Describe the categories of computers

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chapter 1 objectives
CHAPTER 1 OBJECTIVES
  • Recognize the importance of computer literacy
  • Identify the components of a computer
  • Discuss the uses of the Internet and World Wide Web
  • Identify the types of software
  • Describe the categories of computers
  • Identify the types of computer users
  • Discuss various computer applications in society
computer literacy
COMPUTER LITERACY
  • Computer literacy
    • Knowledge and understanding of computers and their uses
  • Computers are everywhere!
what is a computer and what does it do
WHAT IS A COMPUTER AND WHAT DOES IT DO?
  • Electronic machine controlled by instructions stored in its own memory
  • Can accept data (input)
    • raw facts, figures, and symbols
  • Can process data into information
  • Can produce results (output)
  • Can store the results for future use
why is a computer so powerful
WHY IS A COMPUTER SO POWERFUL?
  • Speed
  • Reliability
  • Consistency
  • Storage
  • Communications
what does a computer do
WHAT DOES ACOMPUTER DO?
  • Information Processing Cycle
    • Input
    • Process
    • Output
    • Storage
    • Communication
the components of a computer
THE COMPONENTS OF A COMPUTER
  • Input Devices
  • Output Devices
  • System Unit
  • Storage Devices
  • Communications Devices
networks and the internet
NETWORKS AND THE INTERNET
  • Network
    • Collection of computers and devices connected together
  • Sharing resources
    • hardware, software, data, information
  • Types
    • Local area network - LAN
    • Wide area network
networks and the internet9
NETWORKS AND THE INTERNET
  • Internet: world-wide collection of networks that connects millions of computers
    • Communications
    • Information
    • Shopping
    • Banking and investing
    • Classes
    • Entertainment
networks and the internet10
NETWORKS AND THE INTERNET
  • World Wide Web: billions of documents, called Web pages, available to anyone connected to the Internet
    • Web page
    • Web site
    • Web browser
computer software
COMPUTER SOFTWARE
  • Software = Computer programs: the series of instructions that tells the computer what to do
    • Installing programs
    • Running programs
computer software12
COMPUTER SOFTWARE
  • System Software
    • Operating system
    • Utility program
  • User interface
    • Graphical user interface (GUI)
computer software13
COMPUTER SOFTWARE
  • Application Software
    • Performs specific tasks for users
      • Examples: Word processing, Spreadsheets, Games, Browsers, and much more
    • Packaged software
    • Custom software
computer software14
COMPUTER SOFTWARE
  • Software Development
    • Computer programmers
    • Programming language
categories of computers
CATEGORIES OF COMPUTERS
  • Personal computers (desktop)
  • Mobile computers and mobile devices
  • Mid-range server
  • Mainframe computers
  • Supercomputers
  • Embedded computers
personal computers
PERSONAL COMPUTERS
  • Can perform all of its input, processing, output, and storage activities by itself
  • One user
  • Size: fits on desk or lap
    • desktop, notebook, laptop
  • Price: several thousand $ or less
mobile computers and mobile devices
MOBILE COMPUTERS AND MOBILE DEVICES
  • Input through small keyboard or a stylus; some use voice input
  • PDA (personal digital assistant)
    • Provides calendar, appointment book, address book, calculator, notepad
  • Web-enabled handheld (smart phone)
    • Price: several hundred $ or less
  • Tablet PC
    • Price: several thousand $ or less
mid range servers
MID-RANGE SERVERS
  • Formerly called a minicomputer
  • Supports thousands of users
  • Users connect via a PC or terminal
mainframe computers
MAINFRAME COMPUTERS
  • Large, expensive, very powerful computer
  • Can handle hundreds or thousands of connected users
  • Store huge amounts of data, instructions, and information
supercomputers
SUPERCOMPUTERS
  • Fastest, most powerful computer
  • Used for applications requiring complex mathematical calculations.
    • Examples: weather forecasting, defense
computer applications in society
COMPUTER APPLICATIONSIN SOCIETY
  • Education
  • Finance
  • Government
  • Health care
  • Science
  • Publishing
  • Travel
  • Industry