3Why become computer savvy? Know what computers can do for youKnow the limitations of computersKnow how computers can harm youKnow how to solve computer problemsKnow when & how to get helpDiscussion Question: What was your worst computer problem?
4IT & Your Life: The Future Now Definition: Information Technology (IT) describes any technology that helps to produce, manipulate, store, communicate, and/or disseminate informationPart 1: Computer TechnologyPart 2: Communication TechnologyDiscussion Question: How many times today did YOU use one of these technologies?
5How is IT being used in Education? 99% of schools have internet access85% of college students own their own computer¾ of college students use the internet 4 or more hours per week½ of all college professors require students to use in their classesMany college classes are either taught online or have a class websiteDefinition: Distance Learning is online educationDiscussion Question: Have you ever used the computer in your classroom for something other than the work in that class?
6Rules for Computers in Classrooms Problem: Computers in the classroom can be used or misused.What should they be used for?Following the lecture slidesWorking along with the instructorPerforming instructor-assigned internet searchesCompleting assignments for this classWhat is misuse?Text messaging or ing friendsSurfing the internet for entertainmentDoing assignments for other classes
7Health: High Tech for Wellness Telemedicine: Medical care via telecommunications lets doctors treat patients from far away3D Computer models allow accurate tumor location inside a skullRobots permit precise microsurgeryHandheld computers allow patients to measure blood sugarMedical implants allow stroke patients to directly control computers to talk for themHealth websites provide medical information
8Money: Cashless Society? Definition: Virtual means something that is created, simulated, or carried on by means of a computer or a computer networkVirtual airline ticketsVirtual moneyOnline bill payingPayPalElectronic payroll depositMicropayments for online musicDiscussion Question: How important is security if all your money is virtual?
9Leisure: Infotech in Entertainment & the Arts VideogamesDownloadingMoviesMusicTerm papers????Ethical/legal questionsMost movies use computer animationDigital editing
10IT in Government & Democracy Governments can’t control informationIndividuals can find multiple viewpoints on internetmakes it easier to contact the governmentCompeting websites promote & criticize politiciansBlogs are a tool for political candidates
11Jobs & CareersHotels: Desk clerks use computerized reservations systemsLaw Enforcement: Officers use computersOn patrolTo check stolen carsTo check criminal recordsTo check arrest warrantsEntertainment:Office uses like budgets, payroll, ticketingAlso virtual set design, 3-D animation, special effects
12Jobs & Careers Office careers: Budget, payroll, letter-writing, email Teaching: Automated grading systems, ing parentsFashion: Sales/inventory control systems, ordering, personnelJob-hunting:Use word processor to create resumesPost resumes onlineOnline job searchesDiscussion Question: Can anyone think of a career that does NOT require computer skills?
13The Telephone Grows Up 1973: First cellphone call 2006: Nokia estimates 2 billion mobile phone subscribersToday’s cellphones:Are mobileCan take and send picturesCan connect to the internetCan send and receive text messagesDiscussion Question: Why are cellphones banned in high-security military bases?
14Internet, World Wide Web, & Cyberspace The worldwide computer networkLinks thousands of smaller networksLinks educational, commercial, military entities, and individualsOriginally developed to share only text and numeric data
15Internet, World Wide Web, & Cyberspace The multimedia part of the internetAn interconnected system of servers that support specially formatted documents in multimedia formIncludes text, still images, moving images, soundResponsible for the growth and popularity of the internet
16Internet, World Wide Web, & Cyberspace Term coined by William Gibson in Neuromancer (1984)Described a futuristic computer network people “plugged” into directly with their brainsNow meansThe webChat roomsOnline diaries (blogs)The wired and wireless communications world
17Email Tips Always put a subject line in your message For short messages, that’s all you needSend attachments only when necessaryEvery recipient gets a copy –For 500 people that’s 500 copies!For a short attachment, copy the text to the itself instead of sending the attachmentDon’t open attachments unless you know the senderIt could contain a virus or malware
18Email Tips Use discretion about sending emails s aren’t secretThey can be easily forwarded to othersCheck grammar, spelling to bosses, customersDon’t use to express criticism or sarcasmreceived at work is the property of your employerDeleting messages does not remove them everywhereDon’t neglect real personal contact
195 Computer Types Supercomputers Mainframe Computers Workstations Priced from $1 million to $350 millionHigh-capacity machines with thousands of processorsMulti-user systemsTo learn more about one, go toMainframe ComputersWorkstationsMicrocomputersMicrocontrollers
205 Computer Types Supercomputers Mainframe Computers Workstations Until late 1960’s, the only computer availableCost $5,000 - $5 millionMulti-user systems; accessed using a terminalTerminals only have a keyboard and monitor; can’t be used aloneTo see one, go toWorkstationsMicrocomputersMicrocontrollers
215 Computer Types Supercomputers Mainframe Computers Workstations Introduced in early 1980sExpensive, powerful personal computersUsed for scientific, mathematical, engineering, computer-aided design (CAD), computer-aided manufacturing (CAM)A less-expensive alternative to mainframesTo see some examples with current pricing, go toMicrocomputersMicrocontrollers
225 Computer Types Supercomputers Mainframe Computers Workstations MicrocomputersPersonal computers that cost $500 to $5000Used either stand-alone or in a networkTypes include: desktop, tower, notebooks, or Personal Digital Assistants (PDAs)Microcontrollers
235 Computer Types Supercomputers Mainframe Computers Workstations MicrocomputersMicrocontrollersAlso called embedded computersTiny, specialized microprocessors inside appliances and automobilesThey are in: microwaves, programmable ovens, blood-pressure monitors, air bag sensors, vibration sensors, MP3 players, digital cameras, e-pliances, keyboards, car engine controllers, etc.Discussion Question: Now, how many of you would say you have NOT used a computer today?
24Servers Are central computers May be any of the 4 larger computer types.“Server” describes a functionHold data (databases) and programsConnect to and supply services for clientsClients are other computers like PCs, workstations, other devices
25Understanding Your Own Computer 3 key conceptsPurpose of a computerTurn data into informationData: the raw facts and figuresInformation: data that has been summarized and manipulated for use in decision makingHardware vs. SoftwareHardware is the machinery and equipment in the computerSoftware is the electronic instructions that tell the computer how to perform a task
26Understanding Your Own Computer 3 key concepts (continued)The basic operationsInput: What goes in to the computer systemProcessing: The manipulation a computer does to transform data into informationStorage:Temporary storage: Memory is primary storagePermanent storage: Disks and media such as DVDs and CDs are secondary storageOutput: What comes outNumbers or pictures on the screen, printouts, soundsCommunications: Sending and receiving data
27Building Your Own PC What would you need? Keyboard & Mouse Inside the system cabinetCase and power supplyProcessor chip – the Central Processor Unit (CPU)Memory chips – Random Access Memory (RAM)Motherboard – the system boardMemory chips plug inProcessor chip plugs inMotherboard attaches to system cabinetPower supply is connected to system cabinetPower supply wire is connected to motherboardStorage Hardware: Floppy, Hard Drive, Zip, CD/DVD, USB
28Building Your Own PCStorage Hardware: Floppy, Hard Drive, Zip, CD/DVD, USBStorage capacity is represented in bytes1 byte = 1 character of data1 kilobyte = 1,024 characters1 megabyte = 1,048,576 characters1 gigabyte = over 1 billion characters1 terabyte = over 1 trillion characters1 petabyte = about 1 quadrillion charactersPermanently installed: floppy drives, hard drives, Zip drives, CD/DVD drives, USB portsRemovable media: floppy disks, Zip disks, CDs, DVDs, flash drives
29Building Your Own PC Output hardware Communications hardware Video and sound cardsMonitorSpeakersPrinterJoystickCommunications hardwareModem (internal or external)Network Card
30Software Must be installed before application software System Software (Operating System)Must be installed before application softwareOperating System (OS) options for the PCLinuxWindowsUnixOperating System (OS) options for the MacMac OSApplication SoftwareInstall after the OSApplication depends on OS, for exampleLinux applications won’t work on WindowsWindows applications won’t work on Linux
31Future of Information Technology 3 directions of Computer DevelopmentMiniaturizationSpeedAffordability3 directions of Communications DevelopmentConnectivityInteractivityMultimedia
32Convergence, Portability, & Personalization Convergence: the combination ofComputersConsumer electronicsEntertainmentMass mediaPortabilityCollaboration: software that allowsPeople to share anything instantlyPeople to enhance the information as they forward it
33EthicsDefinition: Ethics is the set of moral values or principles that govern the conduct of an individual or groupIs ethics relevant for Information Technology?Let’s revisit the discussion question from slide 1-7How important is ethics if all your personal information, health information, AND virtual money is stored on computers?Would YOU trust a physician who downloaded his/her term papers from the Internet?