,*,Click to edit Master text styles,Second level,Third level,Fourth level,Fifth level,Click to edit Master title style,Chapter 1 Introduction toComputers,1,Chapter 1 Objectives,Recognize the importance of computer literacy,Define the term computer and identify its components,Explain why a computer is a powerful tool,Recognize the purpose of a network,Discuss the uses of the Internet and the World Wide Web,Distinguish between installing and running a program,Identify the types of software,Describe the categories of computers,Determine how the elements of an information system interact,Identify the types of computer users,Discuss various computer applications in society,Next,2,A World of Computers,What is,computer literacy,?,p.5 Fig.1-1,Next,Knowledge and understanding of computers and their uses,Computers are everywhere,3,How is a,computer,defined?,What Is a Computer?,p.6,Produces and stores results,Next,Electronic device operating under the control of instructions stored in its own memory,Processes data into,information,Data that is organized,meaningful,and useful,Accepts,data,Raw facts,figures,and symbols,4,What Is a Computer?,What is the,information,processing cycle,?,p.6 Fig.1-2,Next,Input,Process,Output,Storage,Communication,5,The Components of a Computer,What is an,input device,?,p.7 Fig.1-3,Click to view Web Link,click Chapter 1,Click Web Linkfrom left navigation,then click Input Devices below Chapter 1,Hardware,used,to enter,data,and instructions,Next,6,The Components of a Computer,What is an,output device,?,p.8 Fig.1-3,Hardware that,conveys information to a user,Next,Click to view Web Link,click Chapter 1,Click Web Linkfrom left navigation,then click Output Devices below Chapter 1,7,The Components of a Computer,What is the,system unit,?,p.8 Fig.1-3,Next,Box-like case,containing,electronic,components,used to process,data,8,The Components of a Computer,What are two main components on the motherboard?,p.8,Central Processing Unit(CPU),Also called a,processor,Carries out instructions that tell computer what to do,Next,Memory,Temporary holding place for data and instructions,9,The Components of a Computer,What is,storage,?,p.8,Storage media,Physical material on which data,instructions,and information are stored,Storage device,Records and retrieves items to and from a storage medium,Next,Holds data,instructions,and information for future use,10,The Components of a Computer,What is,storage media,?,p.8,Digitalcameras,Handheldcomputers,Portable,thin memory cards used in:,Next,11,The Components of a Computer,What is a floppy disk?,p.8 Fig.1-4,Next,Thin,circular,flexible disk enclosed in rigid plastic shell,A USB flash drive is portable,and has much greater storage capacity,12,The Components of a Computer,What is a flash drive?,p.9 Fig.1-5,Next,Provides much greater storage capacity than a floppy disk or Zip,disk,Small and lightweight enough to be transported on a keychain or in a pocket,13,The Components of a Computer,What is a flash drive?,Next,Product,Capacity(MB),Interface*,Thumbdrive Touch(),8/16/32/64/128/256/512/1024,USB 1.1,Data Traveler 2.0 Hi-Speed,(),128/256/512/1024,USB 2.0,Handy Steno HT202(),32/64/128/256/512/1024,USB 2.0,Audio Steno BP300(),64/128,USB 1.1,*1.1=12Mbps,2.0=480Mbps,14,The Components of a Computer,What is a hard disk?,p.9 Fig.1-6,Next,Provides much greater storage capacity than a floppy disk or USB flash drive,Housed inside the system unit,15,The Components of a Computer,What is a compact disc?,p.9 Fig.1-7,Next,Flat,round,portable metal disc,CD-ROM,CD-RW,DVD-ROM,DVD+RW,16,Accuracy,Communications,Why Is a Computer So Powerful?,p.10,What makes a computer powerful?,Storage,ReliabilityandConsistency,Next,Speed,17,One type is a modem,Networks and the Internet,What is a,network,?,p.10,Enables a connection between computers,Cables,Cellular radio,Telephone lines,Satellites,Next,Communications Media,Communications Device,Collection of computers and devices connected together,18,To share,Networks and the Internet,What are the reasons to network?,p.10,Resources,Hardware devices,Software programs,Data,To save time and money,Information,Next,19,Networks and the Internet,What is a server?,p.10 Fig.1-8,Next,Manages the resources on a network,A client accesses the resources on the server,20,Networks and the Internet,What is the,Internet,?,p.11 Fig.1-9,Next,Worldwide collection of networks that connects millions of computers,Click to view Web Link,click Chapter 1,Click Web Linkfrom left navigation,then click Internetbelow Chapter 1,21,Networks and the Internet,p.12 Fig.1-10,Why do users access the Internet?,Information,Shopping,Banking and Investing,Classes,Entertainment,Next,Communications,22,Networks and the Internet,What is the,Web,?,p.13,A,Web site,is a collection of related Web pages,A,Web page,contains text,graphics,sound,video,and links to other Web pages,You can share information by creating Web pages or posting photos on a photo community,Next,Billions of documents,called,Web pages,available