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Computer applications in_modern_day_society

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Computer applications in_modern_day_society

  1. 1. CEN 100 Week 2. Raju.MULLAGIRI
  2. 2.  A network is a collection of computers and devices connected togetherUsed to share Resources Hardware devices Software programs To save Data Information time and money Copyright © 2012 Pearson Next Education. 12/5/2012 2
  3. 3. What is the Internet [DoD – 1969]? Worldwide collection of networks that connects millions of businesses, government agencies, educational institutions, and individuals Copyright © 2012 Pearson Next Education. 12/5/2012 3
  4. 4. Why do users access the Internet (1969)?1. Communications2. Information3. Shopping4. Banking and Investing5. Classes6. Entertainment7. Download Music8. Share Information Copyright © 2012 Pearson Next Education. 12/5/2012 4
  5. 5. What is the Web (1989)?  Billions of documents, called Web pages, available to anyone connected to the Internet A podcast is A Web site is You can share recorded audio a collection of information on a social stored on a Web siterelated Web pages networking Web site that can be downloaded A Web page contains A blog consists of time- text, graphics, audio, stamped articles in video, and links to a journal format other Web pages Difference between the Internet and the WWW Copyright © 2012 Pearson Next Education. 12/5/2012 5
  6. 6. What are the two most popular series of personalcomputers?  Apple Macintosh  PC and compatibles usually uses the use the Windows Macintosh operating operating system system (Mac OS X) Copyright © 2012 Pearson Next Education. 12/5/2012 6
  7. 7. What is a desktop computer? Designed so all of the components fit on or under a desk or table Copyright © 2012 Pearson Next Education. 12/5/2012 7
  8. 8. What is a notebook computer? Portable, small enough to fit on your lap Also called a laptop computer Generally more expensive than desktop computers with equal capabilities Copyright © 2012 Pearson Next Education. 12/5/2012 8
  9. 9. 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 notesCan you say UPS, FEDEX, DHL? Copyright © 2012 Pearson Next Education. 12/5/2012 9
  10. 10. What is a handheld computer? Small enough to fit in one Sometimes referred to hand as an ultra-personal computer (uPC), or an Ultra-Mobile PC (UMPC), or a handtop iPad, etc. !! computer Copyright © 2012 Pearson Next Education. 12/5/2012 10
  11. 11. What is a personal digital assistant (PDA)? Provides personal organizer functions  Calendar  Appointment book  Address book  Calculator  Notepad Copyright © 2012 Pearson Next Education. 12/5/2012 11
  12. 12. What are smart phones? A smart phone is an Internet-enabled telephone that usually provides PDA capabilities Like the iPhone, Treo, Android (‘Droid) etc. Copyright © 2012 Pearson Next Education. 12/5/2012 12
  13. 13. What are game consoles? Mobile computing device designed for single- player or multiplayer video gamesLike the Xbox, Wii,Sony PlayStation3 Copyright © 2012 Pearson Next Education. 12/5/2012 13
  14. 14. What types of servers are there?Server Controls access to networkresources and provides centralizedstorageMainframe Very powerful,expensive computer that supportsthousands of connected users[Also called an Enterprise Server]Supercomputer The fastest, mostpowerful, most expensivecomputer. Used for applicationsrequiring complex mathematicalcalculations Copyright © 2012 Pearson Next Education. 12/5/2012 14
  15. 15. What is an embedded computer? A special-purpose computer that functions as a component in a larger product Copyright © 2012 Pearson Next Education. 12/5/2012 15
  16. 16. What is software? Consists of a series Also called a of instructions that program tells the computer what to do and & DATA how to do it Copyright © 2012 Pearson Next Education. 12/5/2012 16
  17. 17. What is a graphical user interface (GUI)? Allows you to interact with the software using graphics and visual images such as icons Controls how you enter data and instructions and how the screen displays information Copyright © 2012 Pearson Next Education. 12/5/2012 17
  18. 18. What is system software? Programs that control or maintain the operations of the computer and its devices Operating System (OS) is a set of programs that coordinates all activities among computer hardware Utility Programs allow the user to devices perform maintenance-type tasks usually related to managing a computer, its devices or its programs Copyright © 2012 Pearson Next Education. 12/5/2012 18
  19. 19. What is application software? Programs designed to make users more productive Create/Produce useful data Word Spreadsheet Processing Presentation Database Graphics Copyright © 2012 Pearson Next Education. 12/5/2012 19
  20. 20. How do you install and run programs?Step 1: INSTALLWhen you insert agreeting card programdiscin the CD drive for thefirst time, thecomputerbegins the procedureof installing thegreetingcard program on theStep disk.hard 3: USE Step 2: RUNThe greeting card program Once installed, you canexecutes. Using this instruct the computer toprogram, you can create run the greeting cardcustom greeting cards. program. The computer transfers instructions from the hard disk to memory. Copyright © 2012 Pearson Next Education. 12/5/2012 20
  21. 21. What is a programmer? Someone who develops application or system software  Programmer writes the instructions to direct the computer to process data into information Copyright © 2012 Pearson Next Education. 12/5/2012 21
  22. 22. What are the categories of computers? Personal Computers (desktop) Mobile Computers and Mobile Devices Game Consoles Servers Mainframes Supercomputers Embedded Computers Copyright © 2012 Pearson Next Education. 12/5/2012 22
  23. 23. What software is available for a home user? Personal Finance Management Web access Communications Entertainment (Games) Copyright © 2012 Pearson Next Education. 12/5/2012 23
  24. 24. What software is available for a smalloffice/home office (SOHO) user? Productivity software Specialty software Web usage E-mail (Games) Copyright © 2012 Pearson Next Education. 12/5/2012 24
  25. 25. What is available fora mobile user? Hardware  Notebook computers  Tablet PCs  Internet-enabled PDAs  Smart phones Software  Word processing  Spreadsheet  Presentation graphics software Copyright © 2012 Pearson Next Education. 12/5/2012 25
  26. 26. What are the needs of a power user? Extremely fast processors Types of power users  Engineers  Scientists  Architects  Desktop publishers  Graphic artists Copyright © 2012 Pearson Next Education. 12/5/2012 26
  27. 27. What are the needs of the large business user? Payroll Inventory E-commerce Desktop publishing Copyright © 2012 Pearson Next Education. 12/5/2012 27
  28. 28. What are some examplesof computer applicationsin society?  Education  Finance  Government  Health Care  Science  Publishing  Travel  Manufacturing Copyright © 2012 Pearson Next Education. 12/5/2012 28
  29. 29.  Web-based applications ◦ Internet messaging (IM)—free, real-time connection  Two or more parties can use a buddy list to identify and restrict the contacts the person wishes to communicate with ◦ Social networks—include Facebook, MySpace, LinkedIn, and Twitter Copyright © 2012 Pearson Education. 12/5/2012 29
  30. 30.  Collaborative work ◦ Computer forensics—branch of forensic science that deals with legal evidence found on computers, and is used to find and apprehend criminals ◦ Collaborative software includes:  Google Docs—free Web-based word processor and spreadsheet  Wiki—collection of Web pages designed to let anyone with access contribute or modify content  Google Groups—free service that helps users connect, share information, and communicate effectively over the Web Copyright © 2012 Pearson Education. 12/5/2012 30
  31. 31.  Advantages and Disadvantages of Computer Use Copyright © 2012 Pearson Education. 12/5/2012 31
  32. 32.  When using computer hardware: ◦ Do not plug too many devices into electrical outlets. ◦ Use surge protectors. ◦ Place hardware where it can’t fall or be damaged. ◦ Provide adequate space for air circulation around hardware. ◦ Securely fasten computer cables, cords, and wires. Copyright © 2012 Pearson Education. 12/5/2012 32
  33. 33.  Ergonomics—field of study concerned with the fit between people and their work environment Carpal tunnel syndrome (repetitive strain injury or cumulative trauma disorder)—caused by repeated motions that damage nerves in hands, wrists, and arms Copyright © 2012 Pearson Education. 12/5/2012 33
  34. 34.  Promote safety and comfort ◦ Position top of your monitor at eye level ◦ Tilt the monitor back 10 to 20 degrees ◦ Place it at least 20” from your eyes ◦ Keep your wrists flat—use a wrist rest if needed ◦ Rest your eyes often by focusing on an object 20 or more feet away ◦ Stand and stretch periodically Copyright © 2012 Pearson Education. 12/5/2012 34
  35. 35.  Software programs ◦ Contain flaws  Errors cause programs to run slowly or miscalculate.  Bugs are almost impossible to eliminate completely. Copyright © 2012 Pearson Education. 12/5/2012 35
  36. 36.  Computer ethics ◦ Moral dilemmas relating to computer usage Digital piracy ◦ Unauthorized reproduction and distribution of computer-based media Unethical behavior ◦ Sending viruses, stealing credit card information, computer stalking, and installing illegitimate copies of software on computers Copyright © 2012 Pearson Education. 12/5/2012 36
  37. 37.  Computers provide those who are disabled and disadvantaged with added support and opportunities E-learning ◦ Learning without requiring students to be at a specific location at a specific time Copyright © 2012 Pearson Education. 12/5/2012 37
  38. 38.  Automation ◦ Replacement of people by machines and computers Outsourcing ◦ Subcontracting of portions of a job to a third party to reduce cost, time, and energy. Computer technology ◦ Aided globalization and the resulting outsourcing of jobs, as well as structural unemployment—the obsolescence of certain jobs. Copyright © 2012 Pearson Education. 12/5/2012 38
  39. 39.  Bea responsible computer user: ◦ Understand how your computer use affects others. ◦ Obey laws and conform to requests regarding use of cell phones. ◦ Be aware of e-waste and the proper disposal of outdated computer hardware. Copyright © 2012 Pearson Education. 12/5/2012 39

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