operating systems

operating systems

1. systems software

   • manages user interface
   • manages peripheral devices
   • controls computing devices
   • allocates CPU and memory

2. memory management

   • in computers many programs run at the same time; this is called multitasking
     • although programmes appear to run simutaniously they share a processor so take it in turn
   • the activities that the programmes are preforming are called processes
     • some procceses are visible to the user as application softare nut many arent seen. These can be running in the background and the user wont notice

3. application software

   • this is a end-user program
   • also called APPS or applications perform user-identified tasks such as photo editing or entertainment

4. file management

   • this operating system creates files and folders structure for data
   • This makes it easier for users to organise and find data in a systematic way
   • on networks and shared computers, file management is used to control file permissions
   • file permissions control who can see, edit and delete a file
   • this is the operating system that asks for confirmation when you try to delete a file

5. user interface

   • this allows the user to communicate with the computer
   • many operating systems provide a graphical user interface (GUI) with windows, icons, drop-down menus and pointers (WIMP)
   • common GUI's are windows,IOS , and android
   • other interfaces just allow the user to type in commands. These are called command line interface

6. user management

   • on networks and shared computers the operating system manages users
   • login names and passwords are allocate permissions to access files and folders
   • this system is often used in organisations to provent individual users from making changes to computer software

7. peripheral devise management

   • most computers use peripheral devices for input and output of data
   • input devices include
     • keyboard
     • mouse
     • microphone
     • webcam
     • scanner
   • output devices include
     • speaker
     • monitor
     • printer
     • headphones

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