The operating system is software that achieves the computer’s functions such as scheduling, input/output operations, resource allocation, and file system manipulation, among other things. 

It serves as a link between the user and the computer hardware. 

Operating Systems Services 

• The following are the services provided by the operating system: 
• Operation of Input/Output 
• Allocation of resources 
• modification of the file system 
• Execution of the program via the user interface 
• Communication\sSecurity 

The two main roles of the operating system are − 

• Security in Resource Management 

The operating system manages all resources such as the input/output device, memory, processor, device, and file. 

Any unlawful access to computer data, programs, or software is the operating system’s responsibility. This operating system security feature protects data or files from viruses, worms, malware, threats, and illegal remote access, among other things. 

Input/output operation:

While running or conducting an operation, the program or job may require any I/O device. As a result, the operating system will supply the required I/O. 

The Operating System handles various types of inputs, such as keyboard, mouse, and desktop.

Resource allocation:

The Operating System ensures that all available properties are appropriately utilized and assigns which resource to which user for how long. The Operating System makes all of these kinds of decisions. 

CPU, memory, and I/O are examples of distinct sorts of resources. 

File system manipulation: 

The operating system grants the software permission to do file actions such as reading, writing, deleting, and updating files. These are all the possible file system modifications that can be performed with the operating system’s help. 

The Operating System decides where data and files are stored, such as on a floppy disc, a hard disc, or a pen drive. 

User interface: 

Operating systems are crucial because they provide services that allow users to interact with one another. It primarily serves as a user-to-system interface. 

Program execution:

The operating system assists in loading programs into memory and their execution. The currently running software must be able to terminate its execution, either regularly or abnormally. 

Operating systems are involved in executing all kinds of programs, whether they are user or system applications. 

Communication:

• The operating system provides a data transfer service between two processes. Both procedures occur on the same computer or separate machines linked via a computer network. 
• The following are two approaches for implementing communication: 
• Memories that are shared 
• Message transmission 

Security: 

The Operating System makes the most secure use of all the information and resources available on the machine. The operating system’s security component protects the data or file from viruses, worms, malware, threats, and illegal remote access, among other things.