what is operating system?
Operating System is a program that manages the computer hardware and software resources, and also the kernel and cornerstone of the computer system. It also provides a basis for application programs and acts as an intermediary between the computer user and the computer hardware.
examples:
- Mac OS X: Mac OS, operating system (OS) developed by the American computer company Apple Inc. The OS was introduced in 1984 to run the company’s Macintosh line of personal computers (PCs). The Macintosh heralded the era of graphical user interface (GUI) systems. In the 1980s Apple made an agreement allowing Microsoft to use certain aspects of the Mac interface in early versions of Windows. However, except for a brief period in the 1990s, Mac OS has never been licensed for use with computers made by manufacturers other than Apple.
- CentOS: CentOS Linux is a community-supported distribution derived from sources freely provided to the public by Red Hat for Red Hat Enterprise Linux (RHEL). As such, CentOS Linux aims to be functionally compatible with RHEL. CentOS Linux is no-cost and free to redistribute. Each CentOS Linux version is maintained for up to 10 years . A new CentOS Linux version is released approximately every 2 years and each CentOS Linux version is periodically updated (roughly every 6 months) to support newer hardware. This results in a secure, low-maintenance, reliable, predictable, and reproducible Linux environment.
- Windows OS: Windows OS, computer operating system (OS) developed by Microsoft Corporation to run personal computers (PCs). Featuring the first graphical user interface (GUI) for IBM-compatible PCs, the Windows OS soon dominated the PC market. Approximately 90 percent of PCs run some version of Windows.
- Android: Android, operating system for cellular telephones. Android, which is based on Linux, an open source operating system for personal computers, was first developed by the American search engine company Google Inc. The first cellular telephone to feature the new operating system was the T-Mobile G1, released on Oct. 22, 2008.
- iOS : iOS (formerly iPhone OS) is a mobile operating system created and developed by Apple Inc. exclusively for its hardware. It is the operating system that presently powers many of the company's mobile devices, including the iPhone, iPad, and iPod Touch. It is the second most popular mobile operating system globally after Android.
- IpadOS: iPadOS is an upcoming mobile operating system created and developed by Apple Inc. specifically for their iPad line of tablet computers. It was announced at Apple's 2019 Worldwide Developers Conference (WWDC). as a derivation from iOS, but with a greater emphasis put on multitasking. iPadOS supports iPads with an Apple A8 / A8X chip or later. This operating system is now in beta testing.