6. Speaking: Discuss the following topics:
Which are the most popular OS according to you?
Which OS have you used?
Why is it important to assess the operating system on a computer before buying it?
Can you think of other devices that run with Operating systems?
7. Reading: The Classification of Operating systems
Multi-user: Allows two or more users to run programs at the same time. Some operating systems permit hundreds or even
thousands of concurrent users.
Multiprocessing: Supports running a program on more than one CPU.
Multitasking: Allows more than one program to run concurrently.
Multithreading: Allows different parts of a single program to run concurrently.
Real time: Responds to input instantly. General-purpose operating systems, such as DOS and UNIX, are not real-time.
Operating systems provide a software platform on top of which other programs, called application programs, can run. The application programs must be
written to run on top of a particular operating system. Your choice of operating system, therefore, determines to a great extent the applications you can run.
8. Your computer faces many potential threats, such as viruses, malware, and hard drive failure. That's why it's important to do
everything you can to protect your computer and your files. How to protect your computer and data? Does it have the most
reliable anti-virus software?
Watch the video and fill the table below with the best ways to protection your computer.
Against a Virus
Against other causes of data loss
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