ITONLINEEXAM.COM. Chapter 1 Basic Introduction to Computers
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1 ITONLINEEXAM.COM Chapter 1 Basic Introduction to Computers
2 A World of Computers Computers are everywhere 2
3 What Is a Computer? A computer is an electronic device, operating under the control of instructions stored in its own memory Collects data (input) Processing Produces information (output) Information Processing Cycle 3
4 What Is a Computer? 4
5 The Components of a Computer A computer contains many electric, electronic, and mechanical components known as hardware Input Device Allows you to enter data and instructions into a computer Output Device Hardware component that conveys information to one or more people System Unit Storage Device Communications Device Case that contains the electronic components of the computer that are used to process data Records (writes) and/or retrieves (reads) items to and from storage media Enables a computer to send and receive data, instructions, and information to and from one or more computers or mobile devices 5
6 The Components of a Computer 6
7 Advantages and Disadvantages of Using Computers Advantages of Using Computers Speed Reliability Consistency Storage Communications Disadvantages of Using Computers Health Risks Violation of Privacy Public Safety Impact on Labor Force Impact on Environment 7
8 Advantages and Disadvantages of Using Computers Green computing involves reducing the electricity consumed and environmental waste generated when using a computer Strategies include: Recycling Regulating manufacturing processes Extending the life of computers Immediately donating or properly disposing of replaced computers 8
9 Networks and the Internet A network is a collection of computers and devices connected together, often wirelessly, via communications devices and transmission media 9
10 Networks and the Internet The Internet is a worldwide collection of networks that connects millions of businesses, government agencies, educational institutions, and individuals 10
11 Networks and the Internet People use the Internet for a variety of reasons: Communicate Research and Access Information Shop Bank and Invest Online Trading Entertainment Download Videos Share Information Web Application 11
12 Networks and the Internet A social networking Web site encourages members to share their interests, ideas, stories, photos, music, and videos with other registered users 12
13 Computer Software Software, also called a program, tells the computer what tasks to perform and how to perform them System Software Operating system Utility program Application Software 13
14 Computer Software Installing is the process of setting up software to work with the computer, printer, and other hardware 14
15 Computer Software A programmer develops software or writes the instructions that direct the computer to process data into information 15
16 Categories of Computers Personal computers Mobile computers and mobile devices Game consoles Servers Mainframes Supercomputers Embedded computers 16
17 Personal Computers A personal computer can perform all of its input, processing, output, and storage activities by itself Two popular architectures are the PC and the Apple Desktop computer 17
18 Mobile Computers and Mobile Devices Mobile Computer Personal computer you can carry from place to place Mobile Device Computing device small enough to hold in your hand Examples include notebook computers, laptop computers, netbooks, ultra-thins, and Tablet PCs Examples include smart phones and PDAs, e- book readers, handheld computers, portable media players, and digital cameras 18
19 Mobile Computers and Mobile Devices Notebook computer Tablet PC Smart phones and PDAs E-book reader 19
20 Mobile Computers and Mobile Devices Handheld computer Portable media player Digital camera 20
21 Game Consoles A game console is a mobile computing device designed for single-player or multiplayer video games 21
22 Servers A server controls access to the hardware, software, and other resources on a network Provides a centralized storage area for programs, data, and information 22
23 Mainframes A mainframe is a large, expensive, powerful computer that can handle hundreds or thousands of connected users simultaneously 23
24 Supercomputers A supercomputer is the fastest, most powerful computer Fastest supercomputers are capable of processing more than one quadrillion instructions in a single second 24
25 Embedded Computers An embedded computer is a special-purpose computer that functions as a component in a larger product Consumer Electronics Home Automation Devices Automobiles Process Controllers and Robotics Computer Devices and Office Machines Mobile and digital telephones Digital televisions Cameras Video recorders DVD players and recorders Answering machines Thermostats Sprinkling systems Security monitoring systems Appliances Lights Antilock brakes Engine control modules Airbag controller Cruise control Remote monitoring systems Power monitors Machine controllers Medical devices Keyboards Printers Faxes Copiers 25
26 Embedded Computers 26
27 Elements of an Information System Hardware Software Data People Procedures 27
28 Elements of an Information System 28
29 Examples of Computer Usage Home User Personal financial management Web access Communications Entertainment Small Office/Home Office User Look up information Send and receive messages Make telephone calls Mobile User Connect to other computers on a network or the Internet Transfer information Play video games Listen to music Watch movies 29
30 Examples of Computer Usage Power User Work with multimedia Use industry-specific software Enterprise User Communicate among employees Process high volumes of transactions Blog 30
31 Computer Applications in Society Education Finance Government Health Care 31
32 Computer Applications in Society Science Publishing Travel Manufacturing 32
33 Video: Computer History in a Barn CLICK TO START 33
34 Summary Basic computer concepts Components of a computer Networks, the Internet, and computer software Many different categories of computers, computer users, and computer applications in society 34
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