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Operating systems

Description

OS
Alex apellido
Mind Map by Alex apellido, updated more than 1 year ago
Alex apellido
Created by Alex apellido over 6 years ago
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Resource summary

Operating systems
  1. What is an OS?
    1. An operating system is software that manages computer, hardware and software resources and provides common services for computer programs.
    2. How it works?
      1. An OS manages the hardware and software resources of the system. It provides a stable, consistent way for applications to deal with the hardware withou having to know all the details managing the hardware and software resources , is very important as various programs and input/output methods to work fine and get the complete attention of the CPU.
      2. Types of OS.
        1. ·single-tasking: only runs one program at a time. ·Multi-tasking: runs more than one program at a time. ·Single-user: have no facilities to distinguish users but may allow multiple programs to run in tandem. ·Multi-user: extends the basic concept of multitasking with facilities that identify processes and resources such as disk space that allows multiple users to interact with the system. ·Distributed: manages a group of distinct computers and makes them appear to be a single computer. ·Templated: refers to creating a single virtual machine image as a guest OS. ·Embedded OS: are designed to be used in embedded computers. They are designed to operate on small machines like PDAs. ·Real-time: guarantees to process events or data within a certain short amount of time. ·Library: a library OS is one ehich the services that a typical OS provides such as networking, are provided from the libraries.
        2. Functions:
          1. -Processor management -Memory management -Device management -Storage management -Application interface -User interface
          2. Developements
            1. OS developement is one of the most complicated activities in which a computing hobbysit may engage. In some cases, hobby developement is in support of a homebrew computing device, for example, a simple single-board computer powered by a 6502 microprocessor. Or, developement may be for an architecture already in widespread use. OS developement may come from entirely new concepts, or may commence by modeling an existing OS.
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