Operating System

Operating System

1. Concept

   • -Set of programs that allows us to manage the memory, disk, peripherals and oters
   • - The Opetating System help to user to comunicate with the computer
   • - Coordinates and directs all services and applications used by the user

2. Examples

   • For PC
     • Windows
     • MacOs
     • Linux
   • For Mobile
     • Android
     • iOs
     • Windows Phone Os

3. Structure

   • Composed by
     • Aplications or Software
     • Kernel
       • File system
       • Main memory
     • Hardware

4. Types

   • Batch OS
     • This OS processes a set of job at the same time, without any interaction between users and programs
   • Multitasking OS
     • This OS enables to user located at a different terminal, to use a single computer system at the same time
   • Network OS
     • This OS run on a server, provides the capacity for management data, users, groups and others.
   • Mobile OS
     • This OS is designed to power smartphones, tablets and more.
   • Real time OS
     • OS characterized by very short response and procesing times

5. Main Functions

   • Memory management
     • Performs the task allocation and desallocation of memory space
   • Processor management
     • Process management helps to OS create and delete process.
   • Security
     • Security module protects the data and information of a computer system, such as malware, virus and others
   • File management
     • It manages all the file-related activities (create, rename or delete)
   • Communication management
     • Coordination and assignment of compilers, interpreters, and others

6. Main Features

   • Protected and supervisor mode
   • Program execution
   • Information and resources protection
   • Resources allocation
   • Manipulation of the files system

7. Main Advantages

   • Easy to use with a Graphical User Interface
   • Environment in which a user may execute programs
   • Acts as an intermediary among applications

8. Disadvantages

   • In issues, you may lose all the contents which have been stored in your system
   • It is never entirely secure

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