Operating System

Operating System

1. How it works?

   • Operating systems provide a software platform above which other programs, called applications can run . Applications are programmed to operate above a particular operating system , therefore, the choice of operating system largely determines the applications that can use.

2. OS Functions

   • Administration of the processor: the operating system processor manages the distribution between different programs through a scheduling algorithm.
   • -Management Of random access memory: the operating system manages the memory space allocated for each application and for each user, if appropriate.
   • -Management Of inputs and outputs: the operating system to unify and control access of programs to material resources through the drivers (also known as peripheral administrators or input / output).
   • -Management Application execution: the operating system ensures that applications run smoothly giving them the resources they need to function.
   • - Manage authorization: the operating system is in charge of security in relation to the implementation of programs ensuring that resources are used only for programs and users with the appropriate authorizations.
   • -Management File: the operating system manages reading and writing to the file system, and file access authorizations of applications and users.

3. What is an OS?

   • An Operating system is the program that, after being initially loaded into the computer by a boot program, manages all the other programs in a computer

4. Types of OS

   • Real-time operating system (RTOS) - Real-time operating systems are used to control machinery, scientific instruments and industrial systems.
   • Single-user, multi-tasking - This is the type of operating system most people use on their desktop and laptop computers today. Microsoft's Windows and Apple's MacOS platforms are both examples of operating systems that will let a single user have several programs in operation at the same time.
   • Multi-user - A multi-user operating system allows many different users to take advantage of the computer's resources simultaneously

5. OS Developments

   • Internet has become really useful because it has provided a way to node several systems and servers, now internet is very important, nearly indispensable for it to work