1. Computer components This work is licensed under a Creative Commons Attribution-Noncommercial- Share Alike 3.0 License. Skills: none IT concepts: computer components (input devices, output devices, memory, storage and CPU), network application vs. stand-alone application, information flow, operating system, application program, program file vs. data file, embedded system, general purpose computer, RAM, ROM, hardware cost trend

2. Where does this topic fit? Internet concepts –Applications –Technology –Implications Internet skills –Application development –Content creation

3. Computer components Memory CPU Storage devices Input devices Output Devices

4. Input devices

5. Output devices

6. Storage devices

7. CPU and memory

8. Let’s trace the information flow in a word processing, a stand-alone application.

9. Power is off DB Prog SS Prog WP Prog Store both data and program files Operating system Store both the OS and application programs

10. Power on – copy OS to memory (bootstrap) DB Prog SS Prog WP Prog Operating system

11. OS displays the login screen DB Prog SS Prog WP Prog Operating system KeyboardDisplay

12. After login, OS displays the desktop DB Prog SS Prog WP Prog Operating system Display

13. What happens when we write, print and save a word processing document?

14. Copy word processing program into memory DB Prog SS Prog WP Prog WP Prog Mouse 1 2 Operating system Display

15. WP program displays a blank document DB Prog SS Prog WP Prog WP Prog Operating system Display

16. Enter and display the document DB Prog SS Prog WP Prog WP Prog WP Doc Display Keyboard Mouse Operating system Both programs and data

17. Print the document DB Prog SS Prog WP Prog WP Prog WP Doc Printer Mouse Operating system

18. Save the document DB Prog SS Prog WP Prog Operating system WP Prog WP Doc Mouse WP Doc Operating system Display

19. Turn power off DB Prog SS Prog WP Prog Operating system WP Doc

20. Things with computers inside (embedded)

21. General purpose computer Special purpose computer Programs in volatile, random access memory (RAM) Programs in fixed, read only memory (ROM)

22. A few questions

23. Where does the Internet fit in our system diagram?

24. The Internet is Input and Output device

25. What is the input device on the iPad tablet computer? What other input and output devices would you like to see on a tablet computer? Is the storage capacity of your computer greater or less than the memory capacity? What is the cost trend for memory, storage and CPU chips? Why would you want more memory on your next computer? Why would you want more storage on your next computer?

26. Computer components This work is licensed under a Creative Commons Attribution-Noncommercial- Share Alike 3.0 License. Skills: none IT concepts: computer components (input devices, output devices, memory, storage and CPU), network application vs. stand-alone application, information flow, operating system, application program, program file vs. data file, embedded system, general purpose computer, RAM, ROM, hardware cost trend

27. Connectivity speed in context Memory CPU Storage device Internet download Internet upload 8 GB/s 30 plus MB/s 4 Mb/s 1 Mb/s

28. SSD, Win 7 laptop HD, Win Vista laptopHD, Win XP desktop ATTO disk benchmark: SSD speed increase