Presentation on theme: "Introduction to Computers"— Presentation transcript:
1 Introduction to Computers Business Technology ApplicationsStanleyIntroduction to Computers
2 Types of ComputersComputers are electronic devices that can perform tasks and calculations based on the instructions that have been given to it.Personal Computers – small enough to fit on a desk, is relatively inexpensive and is designed for an individual user.Laptop Computers (sometimes called notebooks) same as PC but portableTablet PC – special type of notebook computer that allows you to write or draw on the screen using a digital pencombines the features of a traditional notebook computer with the simplicity of pencil and paperAnd Mobile Devices that are small enough to carry with you such as smart phones, PDAs, handheld computers, portable media players (iPod), and digital cameras
3 Other ComputersSupercomputer – the fastest type of computer. It can store data and perform numerous tasks simultaneously at incredible speeds.Mainframe – less powerful and less expensive than supercomputers but are still capable of storing and processing large amounts of data.Minicomputer – (also called a server) smaller than a mainframe, larger than a microcomputer and can support multiple users with their own terminals at the same time
4 Data and InformationData is a collection of unprocessed items, which can include text, numbers, images, audio and video.Information conveys meaning and is useful to people.Computers process DATA into INFORMATION
5 Components of a Computer hardware is the physical components that make up a computer.These include: input devices, storage devices, and communication devices.Common hardware components include: keyboard, mouse, microphone, scanner, web cam, printer, monitor, speakers, hard disk drive.
6 Components of a Computer Input Device is any hardware component that allows you to enter data and instructions into a computer.Five common input devices include:Keyboard – contains the keys you press to enter data into the computerMouse – small handheld device that allows you to control the movement of a small symbol on the screen called a pointer and you make selections on the screenMicrophone – allows you to speak into the computerScanner – converts printed material into a form the computer can useWeb cam – digital video camera that allows you to create movies or take pictures and store them on the computer instead of on tape or film
7 Components of a Computer Output Device is any hardware component that conveys information to one ore more people. Three commonly used output devices are:printer – produces text and graphics on a medium such as papermonitor – displays text, graphics, and videos on a screenspeakers – allows you to hear music, voice, and other audio
8 Components of a Computer System Unit - case that contains the electronic components of the computer that are used to process dataInside the system unit is the motherboard which has two main componentsthe processormemory
9 Components of a Computer Central Processing Unit (CPU) – the main chip that interprets and carries out the basic instructions that operate the computer.Memory consists of electronic components that store instructions waiting to be executed and data needed by those instructionsThe number of memory locations is stated in terms of BYTESA byte is a unit of storage capable of holding a single character
10 Memory A byte is equal to 8 bits. A kilobyte (KB) is equal to 1,025 bytes or 103.A megabyte (MB) is equal to 1,048,576 bytes or 106 .A gigabyte (GB) is equal to 1,073,741,824 bytes or 109 .Terabyte(TB) 1012, petabyte(PB) 1015, exabyte (EB) 1018, and so on.
11 Networks and the Internet Network is a collection of computers and devices connected together, often wirelessly, which allows computers to share information, programs, printers, or scanners. When a computer connects to a network, it is online.Internet is a worldwide network of smaller computer networks all linked together by unique Internet Protocol addresses. It is the largest computer network, connecting millions of computers and devices around the world.World Wide Web – a system of extensively interlinked hypertext documents: a branch of the Internet – it is one of the more popular services on the InternetWeb contains billions of documents called Web Pages – contain text, graphics, animation, audio, and videoHTML- HyperText Markup Language: the standard protocol for formatting and displaying documents on the World Wide Web
12 Computer Software Software also called a program consists of a series of related instructions, organized for a common purpose, that tells the computer what tasks to perform and how to perform them
13 Two Types of Software:Operating Software - software that manages the computer’s files and programs that provides a means for users to communicate with the computer and other software.Many of today’s computers use Micorsoft’s Windows or Mac OSApplication Software – designed to make users more productive and/or assist them with personal tasksType of Application Software related to communication is a Web browserOthers include word processing software, spreadsheet software, database software, and presentation software
14 Word Processing Software Software that is used to create and print documents such as letters, memos, and reports.
15 Spreadsheet SoftwareSoftware used for analysis and reporting of statistical or numerical data.
16 Database SoftwareSoftware that allows the user to collect, store, organize, modify, and extract data.
17 Test Your Knowledge Creating a birthday card for a friend Balancing your checkbookPrinting a mailing listPracticing math factsKeeping an address bookWriting an essay about your vacationMaking a school newsletterWriting a story about basketballWordProcessingSpreadsheetDatabaseDesktopPublishing
18 Test Your Knowledge Item Keyboard Microsoft Word Windows 7 Modem Input(Hardware)Output(Hardware)Operating SoftwareApplication SoftwareKeyboardMicrosoft WordWindows 7ModemScannerSolitaireSpeakersMac OS X Snow LeopardPrinterGreeting Card Maker