Operating System

What is an operating system? 

An Operating System (OS) is an interface between a computer user and computer hardware. An operating system is a software that performs all the basic tasks like file management, memory management, process management, handling input and output, and controlling peripheral devices such as disk drives and printers.

 The operating system's job 

1. Process Management
2. Memory Management
3. CPU Scheduling
4. File Management
5. Security

Types of Operating System – 

• Batch Operating System- Sequence of jobs in a program on a computer without manual interventions.
• Time-sharing operating System- allows many users to share the computer resources. (Max utilization of the resources).
• Distributed operating System- Manages a group of different computers and makes appear to be a single computer.
• Network operating system- computers running in different operating systems can participate in a common network (It is used for security purposes).
• Real-time operating system – meant applications to fix the deadlines.

Examples of Operating System are – 

• Windows (GUI based, PC)

• GNU/Linux (Personal, Workstations, ISP, File and print server, Three-tier client/Server)

• macOS (Macintosh), used for Apple’s personal computers and workstations (MacBook, iMac).

• Android (Google’s Operating System for smartphones/tablets/smartwatches)

• iOS (Apple’s OS for iPhone, iPad, and iPod Touch)