2 Objectives At the end of the lesson, you should be able to : Define term of computerIdentify the components of a computerDistinguish between system software and application softwareDiscuss the advantages and disadvantages of using computers
3 Objectives Recognize the purpose of a network Discuss the uses of the Internet and World Wide WebDescribe the categories of computersDescribe the various types of computer users
4 Computer LiteracyDef.: Knowledge and understanding about a computer and their uses.
5 What is a COMPUTER?Def. : electronic device operating under the control of instructions stored in its own memory.can accept DATAprocess the data INFORMATIONproduce & STORE the results
6 Components of a Computer INPUT UNITSYSTEM UNITOUTPUT UNITSTORAGE UNITCOMMUNICATION UNIT
7 1. Input Unit consist of hardware used to enter data and instructions e.g.:
8 2. System UnitCase containing electronic components used to process dataE.g.:
9 System UnitThere are 2 main components on a motherboard:CPUMEMORY
10 System Unit Central Processing Unit (CPU) MEMORY (RAM) also called a processorelectronic component that interprets and carries out the basic instructions that operate the computerMEMORY (RAM)electronic component that store instructions waiting to be executed and data needed by those instructions
11 3. Output Unit Hardware that conveys information to one or more user E.g.:
12 4. Storage Unit Def. : Holds data, instructions, and information for future use.Storage Media- physical material on which a computer keeps data, instructions & informationStorage Device- computer hardware that records an/or retrieves items to and from storage media.
13 Storage Unit Storage Device Card reader CD-ROM Drive/ DVD-ROM Drive hard disk/driveExternal/removable hard diskUSB flash driveStorage Mediamemory cardOptical Disc (CD-ROM/DVD-ROM )hard diskUSB flash driveSmart cardCloud storage
14 5. Communication UnitDef: hardware component that enables a computer to send (transmit) and receive data, instructions, and information to and from one or more computers.E.g.: modem(digital modem-cable, isdn, wireless modem, wireless access points)
15 SOFTWARE Also called a program Def.: series of instructions that tells acomputer what to do.System softwareApplication software
16 E.g. : operating systems & utility programs System softwareApplication softwareconsists of the programs that control or maintain the operations of the computer and its devices.serves as the interface between the user, the application software and the computer’s hardware.E.g. : operating systems & utility programsconsist of programs designed to make users more productive and/or assist them with personal task.E.g. : Word Processing, database, Photo Editing, Entertainment
18 System Software Operating System Utility Program is a set of programs that coordinates all activities among computer hardware devices and allows users to run application softwareE.g. Windows 8, Mac OS X, LINUXUtility ProgramPrograms that allows a user to perform maintenance-type tasks, usually related to managing a computer, its devices, or its programs.E.g.: Managing file, removing unwanted files, defragmenting disks, restoring backed up files
19 ADVANTAGES OF USING COMPUTERS CLASS ACTIVITYDiscuss with your friend in 10 minutes.Then, we will discuss the answer together.SpeedReliabilityConsistencyStorageCommunications
20 DISADVANTAGES OF USING COMPUTERS CLASS ACTIVITYDiscuss with your friend in 10 minutes.Then, we will discuss the answer together.Health riskViolation of PrivacyPublic SafetyImpact on Labor ForceImpact on Environment
21 NETWORKDef. : collection of computers and devices connected together, via communications devices and transmission media.Transmission media:What can we share using network?CableWirelessMicrowavesSatelliteConsist of materials capable of carrying one or more signals.
23 INTERNETDef. : worldwide collection of networks that links millions of business, government agencies, educational institutions and individuals.
24 NETWORK & INTERNET Why do users access the internet? Communications InformationShoppingBanking & InvestingEducationEntertainment
25 contains text, graphics, audio, video, and link to other web pages. WEBSITEWebsiteWeb pagecollections of related web pagescontains text, graphics, audio, video, and link to other web pages.Example of website?
26 Categories of Computers Personal ComputersMobile Computers and Mobile DevicesGame ConsolesServersMainframesSupercomputersEmbedded Computers
27 Personal ComputersA computer that can perform all of its input, processing, output and storage activities by itself.It contains:A processorMemoryInput devicesOutput devicesStorage devices2 types of personal computers are desktop computers and notebook computers
28 Personal Computers Desktop computers Also known as PCs, microcomputers, or home computersBroken down into three categories:Low-end computersFully-powered personal computersWorkstationsNetwork computerCentral processing unit and minimal memoryDesigned to be used on a networkSometimes called thin client
29 PC Categories Low-end computers Fully powered computers Workstations Fine for home users, word processing, simple games, Internet accessFully powered computersGood for heavy use of graphics, programming, or action-oriented gamesWorkstationsVery high-end computers used by engineers, financial traders, and graphic designers
30 Mobile Computers & Mobile Devices Mobile computer – personal computer you can carry from place to place. Eg: notebook, netbook, tablet PCsMobile device – computing device small enough to hold in your hand. Eg: PDA, e-book readers, handheld computer, portable media playersCan connect a mobile device to a personal computer to exchange informationInternet-enabled
31 Mobile Computer: Notebook Computers Also called a laptop computerA portable, designed to fit on your lapSmall, lightweight computersCapabilities approach that of desktop computersSimilar processing and memoryMost have hard disk, and diskette or CD-ROM drive
32 Mobile Computer: Notebook Computers Netbook – type of notebook which is smaller, lighter, and often not as powerful as a traditional notebook computerTablet PCs – type of notebook computer that you can interact with by touching the screen with finger or digital penUseful especially for taking notes in lectures, at meetings, conferences, forums
33 Mobile devices Smart phones Internet-enabled phone that usually provides personal information management functions such as calendar, appointment book, address book calculator, notepadOffer variety of application software:Word processingSpreadsheetGamesCapable of conducting live video conference
34 Mobile devices PDA Often looks like smart phone Also provides personal information management functions such as calendar, appointment book, address book calculator, notepadDiffer from smart phone in a way:Does not provide phone capabilitiesDoes not support voice input, built-in camera,portable media player
35 Mobile devices Handheld computer Portable Media Player Small enough to fit in one handCommunicate wirelessly with other devicesInclude digital pen of stylus for inputPortable Media PlayerMobile device which you can store, organize and play digital media
36 Game ConsolesMobile computing device designed for single-player or multiple player video gamesStandard game consoles use:Input – handheld controllerOutput – television screenStorage – hard disk, optical discs, memory cardEg: Xbox 360, Ninetendo’s Wii, Sony’s Playstation 3
37 ServersControl access to the hardware, software and other resources on networkProvides a centralized storage area for programs, data and informationIt can support from two to several thousand connected computer at the same time
38 MainframesLarge, expensive, powerful computer that can handle hundreds or thousands of connected user simultaneously.Store tremendous amounts of data, instructions and information.Most major corporations use mainframes for business activities:To bill millions of customersPrepare payroll for employeesManage thousands od items ininventoryCan act as servers in network environment
39 Supercomputers The fastest, most powerful and most expensive computers Capable of processing more than one quadrillion of instructions per secondUsed for very sophisticated applications requiring mammoth data manipulation:Weather forecastingWeapons researchNuclear energy researchApplication in medicineAutomotive design
40 Embedded ComputerSpecial purpose computer that functions as a component in larger product.E.g. Built-in GPS in car, smart rice-cooker, washing machine.Other example?