Chapter 3 & 4

Computer and Mobile Device

      ·         Type of computers include :

§  Desktops and Mobile Computers

·         personal computer (PC) is a computer 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

·         mobile computer is a portable personal computer, designed so that a user easily can carry it from place to place

·         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

§  Servers and terminals

·         A server is a computer dedicated to providing one or more services to other computers or devices on a network. For an example, Rack server, Blade server and Tower server. It a mainframe is a large, expensive, powerful server that can handle hundreds or thousands of connected users simultaneously.

·         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. Most retail stores use a point of sale (POS) terminal to record purchases, process credit or debit cards, and update inventory.

§  Smartphones, digital cameras, e-book readers and portable media players

·         Smartphone is an Internet-capable phone that usually also includes a calendar, an appointment book, an address book, a calculator, a notepad, games, browser, and numerous other apps. Many smartphones have touch screens.

·         digital camera is a mobile device that allows users to take photos and store the photographed images digitally

·         portable media player, sometimes called a personal media player, is a mobile device on which you can store, organize, and play or view digital media

·         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

§  Game Devices

·         game console is a mobile computing device designed for single-player or multiplayer video games

·         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

§  Embedded Computers

·         embedded computer is a special-purpose computer that functions as a component in a larger product such as Consumer electronics, Home automation devices, and Computer devices and office machines

§  Ports and Connections

·         Port is the point at which a peripheral device attaches to or communicates with a computer or mobile device

·         Connector joins a cable to a port. A connector at one end of a cable attaches to a port on the computer or mobile device, and a connector at the other end of the cable attaches to a port on the peripheral device

§  Protecting Hardware

·         Some schools and businesses use cables to lock computers and help prevent theft of equipment

·         Hardware can fail for a variety of reasons: aging hardware; random events such as electrical power problems; and even errors in programs or apps

§  Health Concerns of Using Technology

·         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

Programs, Software and Application

§  Programs is A set of instructions telling a computer what to do

§  Software is the programs and other operating information used by a computer. Software can be made up of more than one program. All-encompassing term that is often used in contrast to hardware.

§  Application is a program or group of programs that is designed for the end user. Application software cannot run on itself but is dependent on system software to execute.

Operating System

§  An operating system is a set of programs that coordinates all the activities among computer or mobile device hardware.Example of operating system is Windows, Linux, Redhat and Mac OS.

Productivity Applications

§  The ability to create, edit, format, save and distribute a project. For an example:

·         Word processing software allows users to create and manipulate documents

·         Clip art is a collection of drawings, photos, and other images

Graphics and Media Software

§  Graphics software is the ability to edit or make graphic. Example of software is CAD, Paint and Video Audio Editor.

§  media player is a program that allows you to view images and animations, listen to audio, and watch video files

Communications Applications

§  For an example is blogging, browsing, chat room and VoIP.

     Security Tools

§  personal firewall is a security tool that detects and protects a personal computer and its data from unauthorized intrusions

§  Antivirus program protects a computer against viruses by identifying and removing it.

File and Disk Management Tools

§  file manager is a tool that performs functions related to file management

§  disk cleanup tool searches for and removes unnecessary files

§  disk defragmenter is a tool that reorganizes the files and unused space on a computer’s hard disk so that the operating system accesses data more quickly and programs run faster.

§  file compression tool shrinks the size of a file