A computer uses its software to store, process and retrieve information. Computer software can be divided into two types:
1. Application software
2. System software
Application software refers to the software that enables users to perform specific tasks for example, MS-Word is used to create and edit a document.
System software refers to the software that enables a computer to function for eg; windows operating system is system software. The operating system provides a consistent environment for other software to execute commands.
A user can give the computer instructions through input devi9ces such as mouse or keyboard to the operating system. Some of these commands are built into the operating systems, while others are issued through the use of application. The operating system becomes the center through which the system hardware, other software and the user communicate. The rest of the components of the system work together through the operating system.
Function of OS
The various tasks that an operating system performs are:
Process management:
A process is an instance of a program running in a computer. Many processes can run simultaneously in a computer. The OS manages all the process and ensures error-free output. For example, while typing a letter you might like to listen to music on the computer.
I/O operations
The operating system provides a user with an I/O devices so that the user can enter data and access the output. If an I/O device is being used by one process and other processes request for it, the OS schedules the allocation of the device to the second process.
File management
The OS enables you to perform file operation such as creating a file, naming it, opening it, reading it, writing in it and closing it.
Memory management
The OS keeps tracks of the part of the memory that is in use and the part that is free. It then allocates the free part of the memory to other processes ensuring that memory is fully utilized.
1. Application software
2. System software
Application software refers to the software that enables users to perform specific tasks for example, MS-Word is used to create and edit a document.
System software refers to the software that enables a computer to function for eg; windows operating system is system software. The operating system provides a consistent environment for other software to execute commands.
A user can give the computer instructions through input devi9ces such as mouse or keyboard to the operating system. Some of these commands are built into the operating systems, while others are issued through the use of application. The operating system becomes the center through which the system hardware, other software and the user communicate. The rest of the components of the system work together through the operating system.
Function of OS
The various tasks that an operating system performs are:
Process management:
A process is an instance of a program running in a computer. Many processes can run simultaneously in a computer. The OS manages all the process and ensures error-free output. For example, while typing a letter you might like to listen to music on the computer.
I/O operations
The operating system provides a user with an I/O devices so that the user can enter data and access the output. If an I/O device is being used by one process and other processes request for it, the OS schedules the allocation of the device to the second process.
File management
The OS enables you to perform file operation such as creating a file, naming it, opening it, reading it, writing in it and closing it.
Memory management
The OS keeps tracks of the part of the memory that is in use and the part that is free. It then allocates the free part of the memory to other processes ensuring that memory is fully utilized.
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