Slide 2 : Chapter 1 Our Digital World
Presentation Overview : Presentation Overview Immersed in Digital Technology
The Computer Advantage
How Computers Work
Computers and Computer Systems
Components of a Computer System
Categories of Computers
Immersed in Digital Technology : Immersed in Digital Technology Digital
Immersed in Digital Technology : Immersed in Digital Technology Digital
refers to an electronic signal that is processed, sent, and stored as bits
Immersed in Digital Technology : Immersed in Digital Technology Digital
refers to an electronic signal that is processed, sent, and stored as bits
bits are represented by “on” and “off” states
Immersed in Digital Technology : Immersed in Digital Technology How has digital technology infiltrated your daily life?
Immersed in Digital Technology : Immersed in Digital Technology How has digital technology infiltrated your daily life?
Computer technology powers HDTVs, VCRs, microwave ovens, watches, cell phones, and automobiles.
Immersed in Digital Technology : Immersed in Digital Technology How has digital technology infiltrated your daily life?
Computer technology powers HDTVs, VCRs, microwave ovens, watches, cell phones, and automobiles.
Embedded chips, computers, networks, and the Internet and WWW enable us to communicate globally.
Immersed in Digital Technology : Immersed in Digital Technology Computerized devices
have embedded computers to perform a few specific actions
Immersed in Digital Technology : Immersed in Digital Technology A computer is an electronic device that
Immersed in Digital Technology : Immersed in Digital Technology A computer is an electronic device that
operates under a set of instructions
Immersed in Digital Technology : Immersed in Digital Technology A computer is an electronic device that
operates under a set of instructions
accepts data that user supplies
Immersed in Digital Technology : Immersed in Digital Technology A computer is an electronic device that
operates under a set of instructions
accepts data that user supplies
manipulates data according to a program
Immersed in Digital Technology : Immersed in Digital Technology A computer is an electronic device that
operates under a set of instructions
accepts data that user supplies
manipulates data according to a program
produces results
Immersed in Digital Technology : Immersed in Digital Technology A computer is an electronic device that
operates under a set of instructions
accepts data that user supplies
manipulates data according to a program
produces results
stores the results
The Computer AdvantageSpeed : The Computer AdvantageSpeed
The Computer AdvantageSpeed : The Computer AdvantageSpeed Computers operate with lightning-like speed.
The Computer AdvantageSpeed : The Computer AdvantageSpeed Computers operate with lightning-like speed.
PCs execute billions of program instructions in one second.
The Computer AdvantageSpeed : The Computer AdvantageSpeed Computers operate with lightning-like speed.
PCs execute billions of program instructions in one second.
Supercomputers execute trillions of instructions per second, the kind of processing required to forecast the weather and monitor space shuttle flights.
The Computer AdvantageAccuracy : The Computer AdvantageAccuracy
The Computer AdvantageAccuracy : The Computer AdvantageAccuracy Computers are accurate when accurate programs and data are entered.
The Computer AdvantageAccuracy : The Computer AdvantageAccuracy Computers are accurate when accurate programs and data are entered.
If inaccurate programs and/or data are entered (garbage in), the output will also be inaccurate (garbage out) – GIGO.
The Computer AdvantageVersatility : The Computer AdvantageVersatility
The Computer AdvantageVersatility : The Computer AdvantageVersatility Families use computers for entertainment, communications, budgeting, online shopping, homework, playing games, and listening to music.
The Computer AdvantageVersatility : The Computer AdvantageVersatility Families use computers for entertainment, communications, budgeting, online shopping, homework, playing games, and listening to music.
Universities, government agencies, hospitals, and scientific organizations conduct life-enhancing research using computers.
The Computer AdvantageVersatility : The Computer AdvantageVersatility Families use computers for entertainment, communications, budgeting, online shopping, homework, playing games, and listening to music.
Universities, government agencies, hospitals, and scientific organizations conduct life-enhancing research using computers.
Banks conduct money transfers, account withdrawals, and payment of checks via computer.
The Computer AdvantageVersatility : The Computer AdvantageVersatility Retailers process sales transactions and check availability of products.
The Computer AdvantageVersatility : The Computer AdvantageVersatility Retailers process sales transactions and check availability of products.
Manufacturers manage their entire production, warehousing, and selling processes.
The Computer AdvantageVersatility : The Computer AdvantageVersatility Retailers process sales transactions and check availability of products.
Manufacturers manage their entire production, warehousing, and selling processes.
Schools keep records, conduct distance-learning classes, schedule events, and analyze budgets.
The Computer AdvantageStorage : The Computer AdvantageStorage
The Computer AdvantageStorage : The Computer AdvantageStorage Computers accept and store programs and data.
The Computer AdvantageStorage : The Computer AdvantageStorage Computers accept and store programs and data.
Users can access a program again and again to process different data.
The Computer AdvantageStorage : The Computer AdvantageStorage Computers accept and store programs and data.
Users can access a program again and again to process different data.
Computers store huge amounts of data in tiny physical spaces.
The Computer AdvantageCommunications : The Computer AdvantageCommunications
The Computer AdvantageCommunications : The Computer AdvantageCommunications Networks using special equipment and programs allow computers to communicate with each other through telephone lines, cable connections, and satellites.
The Computer AdvantageCommunications : The Computer AdvantageCommunications Networks using special equipment and programs allow computers to communicate with each other through telephone lines, cable connections, and satellites.
Users can exchange information over wireless networks using personal digital assistants (PDAs), notebook computers, cell phones, and pagers.
The Computer Advantage Communications : The Computer Advantage Communications A local area network (LAN) is a network confined to a small geographic area, such as a building, factory, or college campus.
The Computer AdvantageCommunications : The Computer AdvantageCommunications A wide area network (WAN) spans a large geographical area and might connect a company’s manufacturing plants dispersed throughout the United States.
The Computer AdvantageCommunications : The Computer AdvantageCommunications The Internet is a worldwide network of large and small networks linked together via communications hardware, software, and media for the purpose of communicating and sharing information.
The Computer AdvantageCommunications : The Computer AdvantageCommunications The Internet is used for various purposes, including
The Computer AdvantageCommunications : The Computer AdvantageCommunications The Internet is used for various purposes, including
sending and receiving messages
The Computer AdvantageCommunications : The Computer AdvantageCommunications The Internet is used for various purposes, including
sending and receiving messages
researching information
The Computer AdvantageCommunications : The Computer AdvantageCommunications The Internet is used for various purposes, including
sending and receiving messages
researching information
buying and selling products and services
The Computer AdvantageCommunications : The Computer AdvantageCommunications The Internet is used for various purposes, including
sending and receiving messages
researching information
buying and selling products and services
taking online college courses
The Computer AdvantageCommunications : The Computer AdvantageCommunications The Internet is used for various purposes, including
sending and receiving messages
researching information
buying and selling products and services
taking online college courses
accessing entertainment
The Computer AdvantageCommunications : The Computer AdvantageCommunications
The Computer AdvantageCommunications : The Computer AdvantageCommunications World Wide Web – a system of linked computer networks that allows users to move from one site to another by way of links on Web pages
The Computer AdvantageCommunications : The Computer AdvantageCommunications World Wide Web – a system of linked computer networks that allows users to move from one site to another by way of links on Web pages
Web page – an electronic document stored on a computer running on a Web site
The Computer AdvantageCommunications : The Computer AdvantageCommunications World Wide Web – a system of linked computer networks that allows users to move from one site to another by way of links on Web pages
Web page – an electronic document stored on a computer running on a Web site
Search engine – a software program that locates and retrieves requested information
The Computer Advantage : The Computer Advantage What advantages do computers offer?
The Computer Advantage : The Computer Advantage What advantages do computers offer?
Provide speed, versatility, storage, and communications
The Computer Advantage : The Computer Advantage What advantages do computers offer?
Provide speed, versatility, storage, and communications
Widely used in homes, workplace, and society
The Computer Advantage : The Computer Advantage What advantages do computers offer?
Provide speed, versatility, storage, and communications
Widely used in homes, workplace, and society
Used to communicate, manage finances, analyze data, plan, research, and for hundreds of other purposes
How Computers Work : How Computers Work Types of data
How Computers Work : How Computers Work Types of data
Text data – letters, numbers, and special characters
How Computers Work : How Computers Work Types of data
Text data – letters, numbers, and special characters
Graphic data – photographs, charts, and drawings
How Computers Work : How Computers Work Types of data
Text data – letters, numbers, and special characters
Graphic data – photographs, charts, and drawings
Audio data – voice and music
How Computers Work : How Computers Work Types of data
Text data – letters, numbers, and special characters
Graphic data – photographs, charts, and drawings
Audio data – voice and music
Video data – moving pictures and images
How Computers Work : How Computers Work Combining types of data can improve the presentation quality of a message.
How Computers Work : How Computers Work During the information processing cycle, data is entered into a computer, processed, sent as output, and stored (if required for future use).
Computers and Computer Systems : Computers and Computer Systems A personal computer system includes:
System unit
Input devices
Output devices
Storage devices
Communications devices
Components of a Computer System : Components of a Computer System A personal computer system includes:
Components of a Computer System : Components of a Computer System A personal computer system includes:
System unit – the electronic components process data into information
Components of a Computer System : Components of a Computer System A personal computer system includes:
System unit – the electronic components process data into information
Input devices – allow users to enter instructions, data, and commands into a computer; common input devices:
keyboard , mouse, microphone
Components of a Computer System : Components of a Computer System A personal computer system includes:
System unit – electronic components process data into information
Input devices – allow users to enter instructions, data, and commands into a computer; common input devices:
keyboard , mouse, microphone
Output devices – make information available to the user; common output devices:
display screens, printers
Components of a Computer System : Components of a Computer System A personal computer system includes:
Storage devices –provide for permanent storage of programs, data, and information
Components of a Computer System : Components of a Computer System A personal computer system includes:
Storage devices – provide for permanent storage of programs, data, and information
Communications devices – allow a user to exchange instructions, data, and information with other computer users
Components of a Computer System : Components of a Computer System What is the difference between a computer and a computer system?
Components of a Computer System : Components of a Computer System What is the difference between a computer and a computer system?
A computer is the part of the system that processes the data into information.
Components of a Computer System : Components of a Computer System What is the difference between a computer and a computer system?
A computer is the part of the system that processes the data into information.
A computer system includes the computer along with input, output, storage, and communication devices.
Categories of Computers Personal Computers : Categories of Computers Personal Computers fits on a desk, in a briefcase, on a laptop, or is worn
executes 600 million to 3 billion instructions per second
used by a single user or as part of a network
costs a few hundred to thousands of dollars
Categories of Computers Handheld Computer : Categories of Computers Handheld Computer fits in hand(s) or carried in a pocket
executes a few hundred instructions per second
used by a single user or as part of a network
costs $99 to a few hundred dollars
Categories of Computers Workstation : Categories of Computers Workstation similar in size to desktop PC but larger and more powerful
executes 3 to 5 billion instructions per second
used by a single user or as part of a network
costs a few thousand dollars
Categories of ComputersMidrange Server : Categories of ComputersMidrange Server fits into a large cabinet
executes billions of instructions per second
used by hundreds of users at the same time
costs $5,000 to hundreds of thousands of dollars
Categories of ComputersLarge Server or Mainframe : Categories of ComputersLarge Server or Mainframe occupies a partial or full room
executes billions of instructions per second
used by hundreds or thousands of users at the same time
costs several thousands to millions of dollars
Categories of ComputersSupercomputer : Categories of ComputersSupercomputer occupies a full room
executes trillions of instructions per second
used by thousands of users at the same time
costs several million dollars
Categories of Computers : Categories of Computers What are the basic categories of computers and their distinguishing characteristics?
Categories of Computers : Categories of Computers What are the basic categories of computers and their distinguishing characteristics?
Personal computer – self-contained, capable of input, processing, output, and storage
Categories of Computers : Categories of Computers What are the basic categories of computers and their distinguishing characteristics?
Personal computer – self-contained, capable of input, processing, output, and storage
Handheld computer – fits comfortably in a user’s hand
Categories of Computers : Categories of Computers What are the basic categories of computers and their distinguishing characteristics?
Personal computer – self-contained, capable of input, processing, output, and storage
Handheld computer – fits comfortably in a user’s hand
Workstation – high-performance single-user computer
On the Horizon : On the Horizon Based on the information presented in this chapter and your own experience, what do you think is on the horizon?
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