Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.

Introduction to computing lecture1


Published on

Published in: Education, Technology
  • Be the first to comment

Introduction to computing lecture1

  2. 2. TEXT BOOK  Introduction to Computers  By Peter Norton  Other material will be mentioned in the last slide for every lecture  Please do not rely on slides alone, if you want to do well in this course make sure you read the book as well.
  3. 3. MARKING  The marks distribution is as following Quizzes, Assignments and Projects  Sessional 1  Sessional 2  Final Exam  25% 10% 15% 50% Quizzes will be surprise. That is at the start of end of any class I can take a quiz.
  4. 4. MARKING Assignments and Projects will be given through out the course.  Make sure your assignments are not copied in any form. 
  5. 5. ASSIGNMENT 1  Research on the internet and in the library and compile history of computers.  You should write the history in your own words and not just copy paste from the internet.  Give proper references.  Your assignment can be hand written or typed.  The assignment should be no more then 5 pages.  All future assignments will be typed.
  6. 6. COURSE GROUP  Yahoo groups 
  7. 7. PURPOSE OF THE COURSE Give an overview of what computers are and what they can do  Help you do everyday tasks and prepare you to make use of Computers in your field. 
  8. 8. WHAT IS A COMPUTER  A machine which can take instructions, and perform computations based on those instructions.
  10. 10. IS A COMPUTER INTELLIGENT?? NO!!!! The are nothing like a human brain  Computers can only follow instructions blindly  The instructions that we give to the computer to perform a certain task are called programs 
  11. 11. IS A COMPUTER INTELLIGENT?? To understand how dumb a computer is consider the following example  You have created a Robot that of course has a computer as a brain.  You want that robot to go to the market and fetch you an ice cream  Consider what instruction would you need to give to the robot? 
  12. 12. WHAT CAN A COMPUTER DO? A computer can process data very quickly  It can perform millions of calculations in seconds  BUT........  Still it is not intelligent  It can only follow instructions.  It can not make its own decisions  Humans have to tell the computer exactly what to do.
  13. 13. WHY ARE COMPUTERS POWERFUL?  Amazing speed   Can store and organize large amounts of data   Can perform millions of operations in seconds A government can store information about all of its citizens Accuracy Computers are very precise and accurate  Most mistakes that computers make are down to human error 
  14. 14. COMPUTERS FOR INDIVIDUAL USE  Desktop computers The most common type of computer  Sits on the desk or floor  Performs a variety of tasks   Workstations Specialized computers  Optimized for science or graphics  More powerful than a desktop 
  15. 15. COMPUTERS FOR INDIVIDUAL USE  Notebook computers Small portable computers  Weighs between 3 and 8 pounds  About 8 ½ by 11 inches  Typically as powerful as a desktop   Netbook computers  Smaller and less powerful then laptops/notebook computers.
  16. 16. COMPUTERS FOR INDIVIDUAL USE  Tablet    computers Newest development in portable computers Input is through a pen or touch screen Run specialized versions of office products
  17. 17.  Tablet Computers  Have become more popular after the release of iPad in 2010
  18. 18. TABLET COMPUTERS Google Nexus
  19. 19. COMPUTERS FOR INDIVIDUAL USE  Handheld computers Very small computers  Personal Digital Assistants (PDA)  Note taking or contact management  Data can synchronize with a desktop   Smart phones Hybrid of cell phone and PDA  Web surfing, e-mail access 
  20. 20. COMPUTERS FOR ORGANIZATIONS  Network servers      Centralized computer All other computers connect Provides access to network resources Multiple servers are called server farms Often simply a powerful desktop
  21. 21. COMPUTERS FOR ORGANIZATIONS  Mainframes    Used in large organizations Handle thousands of users Users access through a terminal can be a dumb terminal or intelligent terminal
  22. 22. MAINFRAMES VS. NETWORK SERVERS  mainframes are more popular and generally more reliable  Servers are smaller, significantly less expensive  Servers allow users to work "off-line," only needing to connect with the client-server when they need to share information.  With mainframes, everyone must be logged on simultaneously, which can slow the processing speed.
  23. 23. COMPUTERS FOR ORGANIZATIONS  Minicomputers      Called midrange computers Power between mainframe and desktop Handle hundreds of users Used in smaller organizations Users access through a terminal
  24. 24. COMPUTERS FOR ORGANIZATIONS  Supercomputers     The most powerful computers made Handle large and complex calculations Process trillions of operations per second Found in research organizations
  25. 25. WHERE ARE SUPER COMPUTERS USED? The "Big Bang," or the initial expansion of all energy and matter in the universe, happened more than 13 billion years ago in trillion-degree Celsius temperatures, but supercomputer simulations make it possible to observe what went on during the universe's birth  Forecasting hurricanes using live data directly, supercomputers can predict the possible paths a hurricane can take.   Auto manufacturers use supercomputers to simulate auto accidents on video screen. This is less expensive and more revealing then actually crashing a car.
  26. 26. READING MATERIAL  Read the first chapter of your Text book 
  27. 27. REFERENCES Introduction to Computers by Peter Norton  