Ahmed Mahdi Ahmed
292
Computer U-T
Operating Systems
Many people use computers without knowing how does it works. The main software when using the computer is the operating system. The operating system defines all the experience when using a computer it manages the hardware and software resources of the computer system, provides a way for applications to deal with the hardware without having to know all the details of the hardware, and it is the software that makes all the programs we use work, and it organizes and controls the hardware on our computers. Operating systems is the first software we see when we turn on the computer, and the last software we see when the computer is turned off.
It's important to know and understand that not all computers have operating systems. For example the computer that controls the microwave oven in your kitchen doesn't need an operating system, it has only simple tasks to perform, very simple input and output methods (a keypad and an LCD screen). For a computer like this, an operating system would not be needed; it will only add things that are not required. Instead the computer in a microwave oven only runs one program all the time. When using computer systems that are more complex than a microwave oven you need an operating system in order for the computer to work. All have operating systems. The most common are the family of operating systems, the family of operating systems and the operating systems, and there are hundreds of other operating systems available for special applications. The operating system plays the role of the good parent, making sure that each application gets the necessary resources while playing nicely with all the other applications, as well as husbanding the limited capacity of the system to the greatest good of all the users and applications. Even if a particular computer is unique, an operating system can ensure that applications continue to run when hardware upgrades and updates occur, because the operating system and not the application is charged with managing the hardware and the distribution of its resources. Windows 98 is a very good example of an operating system because it can accommodate thousands of different , and special peripherals in any possible combination.