Operating Systems (OS)

Description

Cambridge IGCSE Computing (Computer Software) Mind Map on Operating Systems (OS), created by rwc.carlton on 15/11/2014.
rwc.carlton
Mind Map by rwc.carlton, updated more than 1 year ago
rwc.carlton
Created by rwc.carlton about 10 years ago
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Resource summary

Operating Systems (OS)
  1. Defintion
    1. Collection of programs that control the system hardware resources
      1. Acts as a common programming layer between hardware and the user
        1. This extracts complexity of hardware away from the user
          1. Perfroms all the technical complex parts of running a computer with you just doing a very simplified version
        2. Controls communication to the peripherals devices
          1. Speakers
            1. Secondary Storages
              1. HDD
                1. SDD
                2. Microphones
              2. Resource Manager
                1. Manages and allocates resources of the computer to allow multitasking
                  1. Tasks compete for resources e.g. processor time, memory – the OS allocates resources to these processes.
                  2. Security Handling
                    1. On multi-users system, it allows users with correct permissions to access resources.
                      1. Allows safe file sharing as required
                        1. Stops other users reading your files
                        2. Client
                          1. Allows user access to word, excel
                            1. Examples
                              1. Windows OS
                                1. Linux
                                  1. Mac OS
                                2. Server
                                  1. Dedicated computer for other computers to access
                                    1. Can host
                                      1. Files
                                        1. Gaming
                                          1. Streaming movies, music etc.
                                          2. Windows server, Mac server, Linux (raspberry pie)
                                          3. Features of a GUI (Graphical User Interface)
                                            1. WIMP
                                              1. Windows
                                                1. Icons
                                                  1. Menus
                                                    1. Pointers
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