What is Operating System ? Types of Operating System and Functions of OS

Operating System

An operating system is a very powerful & usually large, program this operating system controls and manage the hardware & software on a computer. All computers devices require operating systems  including your desktop, laptop, smartphone, tablet and also smartwatchs. Operating system is a system software that manages computer hardware and software resources. 

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Operating System

●An operating system is a program that control the execution of application programs & acts an interface between the user of a computer and the computer hardware.
● An operating system is concerned with the allocation of resources & services, such as devices, processors and memory.
● The OS helps you to communicate with the computer without knowing how to speak the computer's language.
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History of Operating System :

● Operating systems were first developed in the 1950s to manage tape storage.
● Mid-1960s operating systems started to use disks.
● Late 1960s, the first version of the Unix OS was developed.
● The first OS built by Microsoft was DOS

Types of Operating System :

● Time sharing Operating System -

This operating System max utilization of the resources, allow many users to share the computer resources.Batch Operating System-
Sequence of jobs in a program on a computer without manual interventions.

● Distributed Operating System -

Distributed operating system manages a group different computers & make appear to be a single computer.

● Network Operating System -

In is operating system used for security purpose and other works.

● Real time operating system -

meant applications to fix the deadlines.

● Multiprocessing OS
● Realtime

Difference between 32-Bit vs. 64-Bit Operating System

• Architecture and Software
• Systems Available
• Memory Limits
• Compatibility

Examples of Operating System

1. Windows :- GUI based pc
2. Linux :- workstations, print server,
3. macOS :- apple’s personal computers : MacBook
4. iOS :- iPhone, iPad
5. Android :- smartphones, smartwatches & tablets

Important Functions of an Operating System :

1. Memory Management

Memory management refers to management of main memory or primary memory.
2. Device Management
OS manages device communication via their respective drivers.
3. Processor Management
Keeps tracks of processor and status of process.

Other Important Activities

1. Job accounting
2. File Management
3. Security
4. Error detecting aids
5. Control over system performance