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Introduction & Operating Systems

Introduction & Operating Systems. Pretest:. What is a computer ? What is an operating system? What is a GUI? What is cheating?. Class Web Pages. http://www.cs.uiuc.edu/class/cs105 /. Introduction. Housekeeping—Changes to Syllabus Checkout the survival tips

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Introduction & Operating Systems

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  1. Introduction & Operating Systems Pretest: What is a computer ? What is an operating system? What is a GUI? What is cheating?

  2. Class Web Pages http://www.cs.uiuc.edu/class/cs105/

  3. Introduction • Housekeeping—Changes to Syllabus • Checkout the survival tips • Grading—MPs, Online Quizzes, and three exams • Plan for course • Handing in work online

  4. Writing an email to an instructor • Go to Web Preferences • Add a Signature! • Include earlier email in yours

  5. And don't forget to check your spelling (-:

  6. If you send a poorly written email… • The people who bring you CS105 will help you develop your email skills this semester. • Expect to have your email message returned to you until you can use the spellchecker and a helpful signature.

  7. What is a computer? This course only deals with electronic computing machines

  8. Computers have REALLY changed over time! • http://www.computerhistory.org/timeline/timeline.php?timeline_category=cmptr

  9. Hardware • Hardware • “The parts of a computer system that can be kicked.” —Henri Karrenbeld

  10. Inputs Hardware CPU on a chip – the Microprocessor (s) MP3 file from the Internet ROM built in, BIOS RAM Chip Outputs

  11. We will cover secondary storage at the end of the course • Secondary storage includes hard drives, CD-ROMs, DVDs, and Flash Memory cards like you find in cell phones, digital cameras, etc. • Most secondary storage will maintain its data without any external source of power. • See Unit B in your Computer Concepts book, Computer Hardware

  12. What can do wrong with hardware? • Memory, disks, CD-ROM drives, floppy drives, video cards, mother boards, CPUs, fans, power supplies, monitors, disk controllers can all FAIL! • Rarely, chips can make calculation errors.

  13. Software in a Computer Software means never having to say you’re finished.” —J. D. Hildebrand Applications Windows XP computerhardware • _____________: Instructions or Computer Programs • _____________: Electronic Devices & Circuits

  14. What is an Operating System? • Hardware needs a manager to tell it • what to do • when to do it • how to do it • The __________________ (OS) controls all • input • output • processing • It manages the data and the memory and appearance

  15. Operating Systems Software iPods Handhelds -- Palm OS Windows XP UNIX (LINUX) Mac OS X UIUC uses UNIX for email servers

  16. Power of an Operating System • An operating system produced by one company can intentionally make it difficult to use software programs produced by another company • For those people wary of Microsoft, Linux is a free Unix-type operating system originally created by Linus Torvalds with the assistance of developers around the world. • More information here: http://www.linux.org/

  17. Commercial Off The Shelf = COTS • When you or your business do not create your own software but use commercial products, that software is called COTS • Microsoft Office is “off the shelf” and not “home grown” • In business, the source of your software can be a critical issue, in terms of reliability and security. • Often today you cannot see the code that constructed the software.

  18. Human-Computer Interface (HCI) • Includes the mouse, instructions via the microphone, commands for the disables, retina scans, as well as the GUI

  19. GUI – each OS has its own (part of HCI) Menu Bar Dialog Box:

  20. …and just a word on Cheating • Question: Is it fun to have my instructor discover that my work is the same as someone else's? • No. • Question: Is it cheating to show my MP or honors project to someone else? • Yes.  Actively showing/sharing all or parts of your code or answers on MPs is cheating. On exams, passively allowing someone to copy your work is cheating.

  21. More on cheating • Question: Do I get a 0 (zero) if another group turns in my work and says they did it? • Yes. We are not blessed with "lie detectors." In order to keep other people out of your laptop or computer, keep it password protected. If you don't take this step, we cannot help you.

  22. Ignorance of the law is no excuse… http://www.admin.uiuc.edu/policy/code/article_1/a1_1-401.html OR

  23. To Summarize: • What is a computer ? • What is an operating system? • What is a GUI? • What is cheating?

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