Computer Virus “A true virus cannot spread to another computer without human assistance. ” Computer virus has now become widespread. It’s almost everywhere in every computer. It is one of….
Discovering Computers ? Chapter 1 : Introduction to Computers Chapter 1 Objectives Recognize the importance of computer literacy Define the term, computer Describe the categories of computers Identify the components of a computer Discuss the advantages and disadvantages of using computers Recognize the purpose of a network Discuss the uses of the Internet and World Wide Web Discuss various computer applications in society Identify the elements of an information system Describe the various types of computer users Distinguish between system software and application software Next A World of Computers What is computer literacy (digital literacy)? Current knowledge and understanding of computers and their uses ? Computers are everywhere Next What Is a Computer? How is a computer defined? ? Electronic device operating under the control of instructions stored in its own memory Processes data into information Conveys meaning and is useful to people Accepts data Collection of unprocessed items Produces and stores results Next What Is a Computer? What is the information processing cycle? ? ? ? ? ? Input Process Output Storage Communication Next The Components of a Computer What is an input device? ? Hardware used to enter data and instructions Next The Components of a Computer
What is an output device? ? Hardware that conveys information to one or more people Next The Components of a Computer What is the system unit? Case that contains the electronic components of the computer that are used to process data ? Next The Components of a Computer What are two main components on the motherboard? Processor Also called a Central Processing Unit (CPU) The electronic component that interprets and carries out the basic instructions that operate the computer Memory Consists of electronic components that store instructions waiting to be executed and data needed by those instructions Next The Components of a Computer
What is storage? ? Holds data, instructions, and information for future use Storage media Physical material on which data, instructions, and information are stored Storage device Records and retrieves items to and from storage media Next The Components of a Computer What is a USB flash drive? ?Portable storage device ? Small and lightweight enough to be transported on a keychain or in a pocket ? The average USB flash drive can hold about 2 billion characters Next The Components of a Computer What is a hard disk? ? Provides greater storage capacity than a USB flash drive ? Most are housed inside the system unit Next
The Components of a Computer What is a compact disc? ? Flat, round, portable metal disc ? ? CD DVD Next The Components of a Computer What is a communications device? Hardware component that enables a computer to send and receive data, instructions, and information Occurs over cables, telephone lines, cellular radio networks, satellites, and other transmission media Next Advantages and Disadvantages of Using Computers What are the advantages of using computers? Speed Reliability Consistency Storage Communications Next Advantages and Disadvantages of Using Computers What are the disadvantages of using computers? Violation of Privacy
Public Safety Impact on Labor Force Health Risks Impact on Environment Next Networks and the Internet What is a network? ? Collection of computers and devices connected together, often wirelessly Used to share Resources Hardware devices Software programs Data Information Saves time and money Next Networks and the Internet What is a server? ? A server controls access to resources on a network ? Clients, or workstations, request resources from the server Next Networks and the Internet What is the Internet? ? Worldwide collection of networks that connects millions of businesses, government agencies, educational institutions, and individuals
Next Networks and the Internet Why do users access the Internet? 1. Communications 2. Research and Information 3. Shopping 4. Banking and Investing 5. Classes 6. Entertainment 7. Download Music 8. Share Information Next Networks and the Internet What is the Web? ? Billions of documents, called Web pages, available to anyone connected to the Internet A Web site is a collection of related Web pages You can share information on a social networking Web site or a photo sharing community A podcast is recorded audio stored on a Web site that can be downloaded A Web page contains text, graphics, audio, video, and links to other Web pages
Categories of Computers What are the categories of computers? Personal Computers (desktop) Mobile Computers and Mobile Devices Game Consoles Servers Mainframes Supercomputers Embedded Computers Next Personal Computers What are the two most popular styles of personal computers? ? PC and compatibles use the Windows operating system ? Apple Macintosh usually uses the Macintosh operating system (Mac OS X) Next Personal Computers What is a desktop computer? ? Designed so all of the components fit entirely on or under a desk or table Next Mobile Computers and Mobile Devices What is a notebook computer? ? Portable, small enough to fit on your lap ?
Also called a laptop computer ? Usually more expensive than a desktop computer with equal capabilities Next Mobile Computers and Mobile Devices What is a Tablet PC? ? Resembles a letter-sized slate ? Allows you to write on the screen using a digital pen ? Especially useful for taking notes Next Mobile Computers and Mobile Devices What are mobile devices? Small enough to carry in a pocket Internet-enabled telephone is a “smart phone” Next Mobile Computers and Mobile Devices What is a handheld computer? Small enough to fit in one hand Used by mobile employees such as meter readers and delivery people Next Mobile Computers and Mobile Devices
What is a personal digital assistant (PDA)? ? Provides personal organizer functions ? ? ? ? ? Calendar Appointment book Address book Calculator Notepad Next Mobile Computers and Mobile Devices What are smart phones? Next Game Consoles What are game consoles? Mobile computing device designed for single-player or multiplayer video games Next Servers What types of servers are there? A server controls access to network resources and provides centralized storage Mainframe Very powerful, expensive computer that supports thousands of connected users Supercomputer The fastest, most powerful, most expensive computer.
Used for applications requiring complex mathematical calculations Next Embedded Computers What is an embedded computer? ? A special-purpose computer that functions as a component in a larger product Next Elements of an Information System What are information system elements? ? ? ? ? ? Hardware Software Data People Procedures Next Examples of Computer Usage What software is available for a home user? ? Personal finance management ? Web access ? Communications ? Entertainment Next Examples of Computer Usage What software is available for a small office/home office (SOHO) user? ? ? ? Productivity software Specialty software Web usage E-mail Next Examples of Computer Usage What is available for a mobile user? ? Hardware ? ? ? ? Notebook computers Tablet PCs Internet-enabled PDAs Smart phones ? Software ? ? ? Word processing Spreadsheet Presentation graphics software Next Examples of Computer Usage What are the needs of a power user? ? Speed and large amounts of storage ? Types of power users ? ? ? ? ? Engineers Scientists Architects Desktop publishers Graphic artists Next Examples of Computer Usage What are the needs of the large business user? ? ? ? Payroll Inventory E-commerce Desktop publishing Next Computer Applications in Society What are some examples of computer applications in society? ? ? ? ? ? ? ? ? Education Finance Government Health Care Science Publishing Travel Manufacturing Next Summary of Introduction to Computers Basic computer concepts The term, computer The uses of the Internet Computer software Categories of computers Types of computer users Computer applications in society The components of a computer The advantages and disadvantages of using computers The purpose of a network Chapter 1 Complete