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Operating Systems

Operating Systems. Write today’s date and title in the front of your book. Underline it. Starter. http://www.youtube.com/watch?v=tGvHNNOLnCk Or watch from the shared area Questions… How much was Windows 1? More to the point – what is Windows?. Lesson Objectives .

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Operating Systems

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  1. Operating Systems Write today’s date and title in the front of your book. Underline it.

  2. Starter • http://www.youtube.com/watch?v=tGvHNNOLnCk • Or watch from the shared area • Questions… • How much was Windows 1? • More to the point – what is Windows?

  3. Lesson Objectives • By the end of this lesson you will: • Be able to define what an operating system is • Be able to identify an Operating System • Identify features of command line and GUI Operating Systems

  4. Operating Systems • Basically it’s the middle man. • The Operating System or OS sits between your hardware and software. • An OS is SOFTWARE too! • It controls, organises and manages the interactions between all hardware and software • If something is plugged in to your computer – the OS is controlling it.

  5. What does an OS consist of… • OS’s come in several parts: • Part of the software is responsible for interacting with the hardware – this is called the Kernel. • The important part you see is the Interface – this is responsible for displaying information to the user and getting commands and input from the user.

  6. Questions… • What does OS stand for? • Is the OS hardware or software? • What is an interface? • What does an OS do?

  7. Summary • Operating System = OS • OS = Software • It controls, organises and manages the interactions between all hardware and software

  8. What does it do… The general tasks for a typical operating system include: • Controlling the operation of the input, output and backing storage devices • Managing resources • Supervising the loading, running and storage of application programs • Dealing with errors that occur in applications programs • Allowing communication between user and the computer system (user interface)

  9. Research… • Find out what a GUI is. • Find 3 examples of GUI operating systems. • Look at your computer – write down 3 features of windows that you think makes it easy to use, explain why...

  10. GUI – Graphical User Interface • GUI – Graphical User Interface • Uses Windows, Icons, Menus, Pointers to organise information and allow user interactions. • Intuitive – The user can work out how to do a lot of things without any • help or training • Makes multitasking easy – can organise and arrange many windows • Icons give clear representations of programs, files and folders • Pointers are a natural way of selecting things – point to what you want • Takes up a lot of space in memory and storage • Can be resource hungry – needs a reasonably powerful computer • Can become confusing if the screen is cluttered with many icons or open • programs

  11. Command Line Interface… • What do you think these do? • dir • md • cd c:\ • rd • Watch the teacher demonstration of a Command Line… (laptop or using the shortcut in the folder/VLE)

  12. Command Line Interface… • What do you think are the advantages and disadvantages of this system? • Where do you think this kind of OS would be used?

  13. Command Line Interface • Command Line Interface • Allows the user to interact with the device by typing written instructions/ commands • Takes up very little memory and storage – good for embedded systems • Can write lists of commands called “scripts” to automate repetitive tasks • Can be much faster to use once familiar with shortcuts and commands • Can be confusing for new users. • Difficult if you have dyslexia / sight problems • You must know the commands or you can’t do anything! • Not intuitive

  14. Plenary… • What is an operating system? • What does GUI stand for? • What does WIMP stand for? • List 2 features of a command line interface? • Who is likely to use a command line interface?

  15. Extras… • The History of Windows… • http://www.youtube.com/watch?v=TWfcZmynwFU • Have a go on Windows 3.1… • www.michaelv.org

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