1 Computer and Internet Basics

2 Objectives Define Computers Explore Computer FunctionsCategorize Computers Examine Personal Computer Systems Explore data, information, and files

3 Objectives Introduce Application and System SoftwareDefine Internet Basics Connect to the Internet Understand World Wide Web Basics Use Browsers Understand Basics

4 A Computer is a device thataccepts input processes data stores data produces output (all according to a series of stored instructions)

5 Computer system consists of:Hardware: microprocessor Peripheral devices: input and output Software: programs

6 Two or more computers that are connected and share data and programsComputer Network Two or more computers that are connected and share data and programs LAN is a local area network

7 Computer Functions Words, symbols, numbers, sound, pictures, program instructions Input Program calculates, sorts modifies data Uses microprocessor or CPU Process Results of processing Reports, graphs, documents, pictures Printer or monitor Output Memory is temporary holding area (RAM) Storage is permanent (disk) Store

8 Categorizing ComputersCost Usage Size Capability

9 Less Powerful ComputersPC/microcomputer Workstations Handheld computer/PDA Videogame console Sony PlayStation®

10 More Powerful ComputersServer Supplies network computers with data Mainframe Large, expensive, powerful, many users Reliability, data security, central control important Supercomputer Fastest and most powerful Info web: supercomputer

11 Computer System Peripherals Computer +input devices + output devices + storage devices

12 System Unit Power Supply Storage Devices Circuit Boards

13 Input/Output Devices Monitor Keyboard Mouse Modem PrinterSpeakers/sound card

14 Storage Devices Floppy disk drive Hard disk drive CD-ROM driveDVD drive CD writer

15 Data vs. Information Data (symbols) used by computersInformation (meaningful) used by people

16 Data Binary number system to define electronic data 0 or 1 BitByte (8 bits)

17 Files Collection of data on a storage medium Data file (passive)Executable file (active) Filename and extension Image.jpg Word.exe Resume.doc

18 System Software Helps the computer monitor itself in order to function efficiently Operating system Master controller of all computer activities Popular operating systems PCs: Microsoft Windows, Mac OS Handhelds: Windows CE and Palm OS Servers: Linux and UNIX

19 Platform Microprocessor + Operating systemMac and PC compatibility is an issue Apple computer = Mac platform Original IBM computer = Windows or PC platform Info web: Apple computers

20 Designed to carry out a particular taskApplication Software Microsoft Excel Microsoft PowerPoint Designed to carry out a particular task

21 Internet Basics (Cyberspace)Internet is a collection of local, regional, national and international computer networks that are linked together to exchange data and distribute processing tasks. Infoweb: cyberspace Infoweb: internet resources

22 Internet Terminology Backbone: defines main Internet routes TCP/IP:Constructed and maintained by major telecommunications companies TCP/IP: Transmission Control Protocol/ Internet Protocol

23 Internet Terminology Server/server softwareIP Address: unique number for each Internet computer

24 Internet Resources Internet Telephony Usenet E-commerceInstant Messaging Web Sites Internet Radio Download Or Upload Chat Groups

25 Internet Service Provider (ISP)Provides internet access to businesses, organizations and individuals Provides telecommunications equipment User ID and password required Connects you to backbone account monthly fee

26 World Wide Web Basics Files interconnected via hypertextWeb pages make up a web site Home Page Links or hyperlinks Web servers Infoweb: hypertext

27 World Wide Web Basics http://www.cnn.com/showbiz/movies.htmURL (Uniform Resource Locator) No spaces and Case sensitive HTTP (Hypertext Transfer Protocol) – communications standard HTML (Hypertext Markup Language) .htm or .html file extension Document name and filename extension Folder name Web server protocol standard

28 Using Browsers Can type URLsHTML tags tell browser how to display web page data Back, forward and stop buttons Setting a home page Print options History list Favorites and bookmarks Edit and Find Infoweb: browser Microsoft Internet Explorer® and Mozilla Firefox®

29 Search Engines Keywords

30 Computer and Internet BasicsEnd