Computers and Mobile Devices.pdf

DISCOVERING COMPUTERS Digital Technology, Data, and Devices Computers and Mobile Devices: Evaluating Options for Home and Work Copyright © Cengage Learning®. May not be scanned, copied or duplicated, or posted to a publicly...

DISCOVERING COMPUTERS Digital Technology, Data, and Devices Computers and Mobile Devices: Evaluating Options for Home and Work Copyright © Cengage Learning®. May not be scanned, copied or duplicated, or posted to a publicly accessible website, in whole or in part.  Computers and Mobile Devices Types of computers and mobile devices include: Laptops, tablets, and desktops Servers and terminals Smartphones, digital cameras, e-book readers, portable and digital media players and wearable devices Game devices Embedded computers Copyright © Cengage Learning®. May not be scanned, copied or duplicated, or posted to 3-2 a publicly accessible website, in whole or in part. Mobile Computers and Desktops (1 of 7) A mobile computer is a portable personal computer, designed so that a user easily can carry it from place to place A personal computer (PC) is a mobile computer or desktop that can perform all of its input, processing, output, and storage activities by itself and is intended to be used by one person at a time Copyright © Cengage Learning®. May not be scanned, copied or duplicated, or posted to 3-3 a publicly accessible website, in whole or in part. Mobile Computers and Desktops (2 of 7) Copyright © Cengage Learning®. May not be scanned, copied or duplicated, or posted 3-4 to a publicly accessible website, in whole or in part.  Mobile Computers and Desktops (3 of 7) A laptop, also called a notebook computer, is a thin, lightweight mobile computer with a screen in its lid and a keyboard in its base Figure 3-3 Traditional laptops weigh more than ultrathin laptops. Copyright © Cengage Learning®. May not be scanned, copied or duplicated, or posted 3-5 to a publicly accessible website, in whole or in part.  Mobile Computers and Desktops (4 of 7) A tablet is a thin, lighter-weight mobile computer that has a touch screen Figure 3-4 Examples of slate and convertible tablets. Copyright © Cengage Learning®. May not be scanned, copied or duplicated, or posted 3-6 to a publicly accessible website, in whole or in part.  Mobile Computers and Desktops (5 of 7) A handheld computer is a computer small enough to fit in one hand Figure 3-6 This handheld computer is a lightweight computer that enables warehouse employees to take inventory and check supplies. Copyright © Cengage Learning®. May not be scanned, copied or duplicated, or posted 3-7 to a publicly accessible website, in whole or in part.  Mobile Computers and Desktops (6 of 7) A stick computer is a small computer which usually is the same size as, or a little larger than, a USB flash drive Figure 3-7 Stick computers are approximately the same size as USB flash drives and can connect to an HDMI port on a TV or computer monitor. Copyright © Cengage Learning®. May not be scanned, copied or duplicated, or posted 3-8 to a publicly accessible website, in whole or in part.  Mobile Computers and Desktops (7 of 7) A desktop, or desktop computer, is a personal computer designed to be in a stationary location, where all of its components fit on or under a desk or table Figure 3-8 The desktop with a tower shown in this figure is a Windows computer, and the all-in-one is a Mac computer. Copyright © Cengage Learning®. May not be scanned, copied or duplicated, or posted 3-9 to a publicly accessible website, in whole or in part.  Servers (1 of 3) A server is a computer dedicated to providing one or more services to other computers or devices on a network – Rack server – Blade server – Tower server Figure 3-9 Shown here are a rack server, blade server, and tower server. Copyright © Cengage Learning®. May not be scanned, copied or duplicated, or posted 3-10 to a publicly accessible website, in whole or in part.  Servers (2 of 3) Table 3-1 Dedicated Servers Type Main Service Provided Application server Stores and runs apps Backup server Backs up and restores files, folders, and media Database server Stores and provides access to a database Domain name server Stores domain names and their corresponding IP addresses File server (or storage server) Stores and manages files FTP server Stores files for user upload or download via FTP Game server Provides a central location for online gaming Home server Provides storage, Internet connections, or other services to computers and devices in a household List server Stores and manages email lists Mail server Stores and delivers email messages Network server Manages network traffic Print server Manages printers and documents being printed Web server Stores and delivers requested webpages to a computer via a browse Copyright © Cengage Learning®. May not be scanned, copied or duplicated, or posted 3-11 to a publicly accessible website, in whole or in part.  Servers (3 of 3) Virtualization is the practice of sharing or pooling computing resources, such as servers and storage devices – Server virtualization uses software to enable a physical server to emulate the hardware and computing capabilities of one or more servers, known as virtual servers A server farm is a network of several servers together in a single location A mainframe is a large, expensive, powerful server that can handle hundreds or thousands of connected users simultaneously Copyright © Cengage Learning®. May not be scanned, copied or duplicated, or posted to 3-12 a publicly accessible website, in whole or in part.  Terminals (1 of 4) A terminal is a computer, usually with limited processing power, that enables users to send data to and/or receive information from a server, or host computer A thin client is a terminal that looks like a desktop but has limited capabilities and components Most retail stores use a POS terminal to record purchases, process credit or debit cards, and update inventory Copyright © Cengage Learning®. May not be scanned, copied or duplicated, or posted to 3-13 a publicly accessible website, in whole or in part.  Terminals (2 of 4) Figure 3-10 Many grocery stores offer self-service checkouts, where consumers use POS terminals to scan purchases, scan their store or saver card and coupons, and then pay for the goods. Copyright © Cengage Learning®. May not be scanned, copied or duplicated, or posted 3-14 to a publicly accessible website, in whole or in part.  Terminals (3 of 4) An ATM (automated teller machine) is a self- service banking terminal that connects to a host computer through a network Figure 3-11 An ATM is a self-service banking terminal that allows customers to access their bank accounts. Copyright © Cengage Learning®. May not be scanned, copied or duplicated, or posted 3-15 to a publicly accessible website, in whole or in part.  Terminals (4 of 4) A self-service kiosk is a freestanding terminal that usually has a touch screen for user interaction Table 3-2 Self-Service Kiosks Type Typical Services Provided Pay bills, add money to prepaid cards and phone plans, and Financial kiosk perform other financial activities. Print photos from digital images. Some allow editing of digital photos. Users may print Photo kiosk directly at the kiosk or may send an order to a photo lab to be printed. Print tickets. Located in airports, amusement parks, movie Ticket kiosk theaters, rental companies, and train stations. Dispense item after payment is received. Examples include Vending kiosk DVD rentals and license plate renewals. Visitor kiosk Manage Located in businesses, police stations, schools, and track visitors hospitals, and other areas where access is controlled or upon check-in. registration is required. Copyright © Cengage Learning®. May not be scanned, copied or duplicated, or posted 3-16 to a publicly accessible website, in whole or in part.  Supercomputers A supercomputer is the fastest, most powerful computer – and the most expensive – Capable of processing many trillions of instructions in a single second Figure 3-13 Supercomputers can process more than one quadrillion instructions in a single second. Copyright © Cengage Learning®. May not be scanned, copied or duplicated, or posted 3-17 to a publicly accessible website, in whole or in part.  Cloud Computing Cloud computing refers to an environment that provides resources and services accessed via the Internet Figure 3-14 Users access resources on the cloud through their Internet connections. Copyright © Cengage Learning®. May not be scanned, copied or duplicated, or posted 3-18 to a publicly accessible website, in whole or in part.  Mobile Devices (1 of 10) A smartphone is an Internet-capable phone that usually also includes a calendar, an address book, a calculator, a notepad, games, browser, and numerous other apps Many smartphones have touch screens. Instead of or in addition to an on-screen keyboard, some have a built-in mini keyboard on the front of the phone or a keyboard that slides in and out from behind the phone Copyright © Cengage Learning®. May not be scanned, copied or duplicated, or posted to 3-19 a publicly accessible website, in whole or in part.  Mobile Devices ( 9 of 10) An e-book reader (short for electronic book reader), or e- reader, is a mobile device that is used primarily for reading e-books and other digital publications Figure 3-21 E-book readers enable you to read e-books and other digital publications such as newspapers and magazines. Copyright © Cengage Learning®. May not be scanned, copied or duplicated, or posted 3-20 to a publicly accessible website, in whole or in part.  Mobile Devices ( 10 of 10) A wearable device or wearable is a small, mobile computing device designed to be worn by a consumer Figure 3-22 Three popular wearable devices include activity trackers, smartwatches, and smart glasses. Copyright © Cengage Learning®. May not be scanned, copied or duplicated, or posted 3-21 to a publicly accessible website, in whole or in part.  Game Devices ( 1 of 2) A game console is a mobile computing device designed for single-player or multiplayer video games A handheld game device is a small mobile device that contains a screen, speakers, controls, and game console all in one unit Game controllers include gamepads, joysticks and wheels, dance pads, and a variety of motion- sensing controllers Copyright © Cengage Learning®. May not be scanned, copied or duplicated, or posted to 3-22 a publicly accessible website, in whole or in part.  Game Devices (2 of 2) Figure 3-23 Gamers have a variety of ways to direct movements and actions of on-screen objects. Copyright © Cengage Learning®. May not be scanned, copied or duplicated, or posted 3-23 to a publicly accessible website, in whole or in part.  Embedded Computers (1 of 2) An embedded computer is a special-purpose computer that functions as a component in a larger product – Consumer electronics – Home automation devices – Automobiles – Process controllers and robotics – Computer devices and office machines Copyright © Cengage Learning®. May not be scanned, copied or duplicated, or posted to 3-24 a publicly accessible website, in whole or in part.  Embedded Computers (2 of 2) Figure 3-24 Some of the embedded computers designed to improve your safety, security, and performance in today’s vehicles. Copyright © Cengage Learning®. May not be scanned, copied or duplicated, or posted 3-25 to a publicly accessible website, in whole or in part.  Putting It All Together Table 3-3 Categories of Computers and Mobile Devices Number of Category Physical Size Simultaneously General Price Range Connected Users Personal computers Usually one (can be Several hundred to several Fits on a desk (desktop) more if networked) thousand dollars Less than a hundred Mobile computers and Fits on your lap or in Usually one dollars mobile devices your hand to several thousand dollars Small box or Several hundred dollars Game consoles One to several handheld device or less Small cabinet to roomful Several hundred to several Servers of equipment Two to thousands million dollars Half a million to several Supercomputers Full room of equipment Hundreds to thousands billion dollars Embedded in the price of Embedded computers Miniature Usually one the product Copyright © Cengage Learning®. May not be scanned, copied or duplicated, or posted 3-26 to a publicly accessible website, in whole or in part.  Protecting Hardware (2 of 5) Figure 3-27 Some mobile computers and devices include fingerprint readers, which can be used to verify a user’s identity. Copyright © Cengage Learning®. May not be scanned, copied or duplicated, or posted 3-27 to a publicly accessible website, in whole or in part.  Protecting Hardware (3 of 5) Hardware can fail for a variety of reasons: aging hardware; random events such as electrical power problems; and even errors in programs or apps – Undervoltage – Overvoltage or power surge Copyright © Cengage Learning®. May not be scanned, copied or duplicated, or posted to 3-28 a publicly accessible website, in whole or in part.  Protecting Hardware (4 of 5) A surge protector, also called a surge suppressor, uses electrical components to provide a stable current flow and minimize the chances of an overvoltage reaching the computer and other electronic equipment Figure 3-28 Circuits inside a surge protector safeguard against electrical power variations. Copyright © Cengage Learning®. May not be scanned, copied or duplicated, or posted 3-29 to a publicly accessible website, in whole or in part.  Protecting Hardware (5 of 5) An uninterruptible power supply (UPS) is a device that contains surge protection circuits and one or more batteries that can provide power during a temporary or permanent loss of power Figure 3-29 If power fails, a UPS uses batteries to provide electricity for a limited amount of time. Copyright © Cengage Learning®. May not be scanned, copied or duplicated, or posted 3-30 to a publicly accessible website, in whole or in part.  Health Concerns of Using Technology (1 of 2) A repetitive strain injury (RSI) is an injury or disorder of the muscles, nerves, tendons, ligaments, and joints Computer vision syndrome (CVS) is a technology- related health condition that affects eyesight Ergonomics is an applied science devoted to incorporating comfort, efficiency, and safety into the design of items in the workplace Technology addiction occurs when the technology consumes someone’s entire social life Copyright © Cengage Learning®. May not be scanned, copied or duplicated, or posted to 3-31 a publicly accessible website, in whole or in part.  Health Concerns of Using Technology (2 of 2) Figure 3-32 A well designed work area should be flexible to allow adjustments to the height and build of different individuals. Copyright © Cengage Learning®. May not be scanned, copied or duplicated, or posted 3-32 to a publicly accessible website, in whole or in part.  Summary Characteristics of and purchasing guidelines for laptops, tablets, desktops, smartphones, digital cameras, and portable and digital media players Servers, supercomputers, point-of-sale terminals, ATMs, self-service kiosks, e-book readers, wearable devices, game devices, embedded computers, and cloud computing Ports and connections Ways to protect hardware Health concerns of using technology and preventative measures Copyright © Cengage Learning®. May not be scanned, copied or duplicated, or posted to 3-33 a publicly accessible website, in whole or in part.