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* It loads itself into the computer memory.
* It loads user programs and data into the computer memory.
* It allocates various jobs to various resources.
* It controls and co-ordinates the entire computer system.
* It provides 'Housekeeping' and 'File management' utilities that perform useful tasks such as,
~ Disk preparation (formatting, partitioning etc.,)
~ File operations (creating, displaying, copying, combining, renaming and deletion of files etc.)
* It Automates the repetitive tasks through automatic execution, through the batch, files.
* Controls the way of displaying information on the screen.
* It controls the various application programs, such as word processors, electronic spreadsheets, database management programs, accounting programs, etc.
* Scheduling new jobs for execution according to the desired priority.
* Maintaining security, communication of errors and control measures to the users.
2. Types of Operating System :
The various types of operating systems are
* Single user operating system
* Multi-user operating system
* Time sharing operating system
* Virtual storage operating system
* Real time operating system
* Multiprocessing operating system
* Operating systems as virtual machines/Virtual machine operating system.
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