Discussion

An operating system is a software controlling the operation of a computer system and its resources. Major functions of operating systems may include:

Managing memory and other system resources.

Imposing security and access policies.

Scheduling and multiplexing processes and threads.

Launching and closing user programs, and providing basic system services for them.

Providing a basic user interface and application programmer interface.
examples:

Linux is free and open source. It is based on UNIX prototype. It is a multi-user and multi-task operating system. Anyone can modify its code and pages. The main purpose of Linux is not to accept the restrictions of commercialization. We will deploy the server on the Linux system more efficiently, stably and safely.

Mac OS is an operating system running on Apple Macintosh computers. Mac OS is the first graphical user interface operating system to succeed in business.

iOS is a mobile operating system developed by Apple. Apple first announced the system at Macworld Conference on Jan. 9, 2007. It was originally designed for the use of the iPhone, but later it was applied to products such as iPod touch, iPad and Apple TV.

iPadOS is a new version of the operating system developed by Apple. It mainly takes advantage of the tablet's large screen and handwritten pen, focuses on screen splitting and multi-task interaction, and can share tasks with laptops.

Windows operating system is the most common computer operating system, which is the operating software developed by Microsoft. The software has gone through many years of development, and the current win10 system is quite mature. Windows operating system has the characteristics of good human-computer interaction, many supporting applications and strong hardware adaptability.