Chapter 1 Digital Literacy A World of Technology 02 19 2016 Digital literacy involves having a current knowledge and understanding of computers mobile devices the Internet and related technologies Computer is an electronic device operating under the control of instructions stored in its own memory o Accepts data input processes produces info output o Laptop thin light weight mobile computer with a screen in its lid and keyboard in the base o Tablet mobile computer with a touch screen See touch screen gestures Slate does not contain keyboard o Desktop personal computer designed to be in a stationary location where all components fit on under desktop or table Some screens for desktops support touch o Server computer dedicated to providing one or more services to other computers or devices on a network Mobile and Gaming Devices o Mobile device computer small enough to fit in your hand Smart phone internet capable phone that usually also includes other apps calendar address book calculator etc Communicate with other smart phones text message picture message video message Digital camera allows you to take and store photos Portable media player mobile device where you can store organize and play digital media Music photos videos etc E book reader mobile device used for reading o Gaming Devices Gaming console designed for single or multiplayer video games Data and Information o Computers process data input into information output and store data for future use o Input device hardware component that allows you to enter data and instructions into a computer Keyboard contains keys you press to enter data and instructions into a computer or mobile device Pointing device is an input device that allows a user to control a small symbol on the screen called a pointer Mouse touchpad microphone Some mobile devices and computers enable you to speak data instructions using voice input and to capture live full motion images using video input Scanner A scanner is a light sensing input device that converts printed text and images into a form the computer can process o Output device any hardware component that conveys information from a computer or mobile device to one or more people Printer output device that produces text and graphics on a physical medium such as paper Display an output device that visually conveys text graphics and video information Speakers allow you to hear audio such as music voice and other sounds Earbuds Headphones o Memory and Storage Memory consists of electronic components that store instructions waiting to be executed and the data needed by those instructions Storage holds data instructions and info for future use Storage media where a computer keeps data instructions and information Storage device records writes and or retrieves reads items to and from storage media EX a DVD drive storage device accepts a DVD storage media Hard disk storage device that contains one or more inflexible circular platters that use magnetic particles to store data instructions and info External hard disks are portable Solid State Drives SSD typically uses flash memory to store data instructions and info USB Flash Drives portable flash memory storage device that you plug into a USB port Memory Card removable flash memory very small Optical discs flat round metal disc DVD Cloud storage storage via the internet The Internet o Internet a worldwide collection of networks that connects millions of businesses government agencies educational institutions and individuals The world wide web web a global library of information available to anyone connected to the Internet Search info Communication Share info Access news The web consists of a worldwide collection of electronic documents each of which is called a webpage A website is a collection of related webpages webpages A web server is a computer that delivers requested webpages to your computer A browser is software that enables users with an Internet connection to access and view webpages on a computer or mobile device Internet explorer firefox google chrome safari A search engine is software that finds websites webpages images videos news maps and other information related to a specific topic Google o An online social network encourages members to share their interests ideas stories photos music and videos with other registered users Also called social networking site Facebook twitter linked in o Internet communications IM real time conversations Emails send messages via computer network VoIP enables users to speak to others FTP transfer items to and from users Digital Security and Safety o It is important that users protect their computers and mobile devices o Viruses and Other Malware Acts without a user s knowledge and deliberately alters the computer s operations Examples of Malware viruses worms Trojans spyware o Privacy o Health Concerns Prolonged improper use of computers can lead to injuries disorders of the hands wrists elbows eyes neck and back Protect yourself by proper workplace design good posture work breaks o Environmental Issues Green computing involves reducing the electricity consumed and environmental waste generated when using a computer Strategies Recycling Using energy efficient hardware and energy saving features Regulating manufacturing processes Extending the life of computers Immediately donating or properly disposing of replaced computers Programs and Apps o Software also called a program tells the computer what tasks to perform and how to perform them Two categories System software Operating system set of programs that coordinates all activities among computer or mobile device hardware o EX Microsoft windows MAC Android Application software apps programs designed to make users more productive and assist them with personal tasks Categories of Apps o Productivity word power point o Graphics and Media editing media o Personal Interest mapping entertainment o Communications browser email o Security antivirus firewall spyware finance player VoIP FTP removers Installing is the process of setting up software to work with the computer printer and other hardware Once installed you can run an application so that you can interact with it You interact with a program or application through its user interface o Developing Programs and Apps A software developer sometimes called an application developer or computer programmer is someone who develops programs and apps or writes the instructions that direct the computer or mobile device
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