List of the Top and Most Popular Operating Systems with Features and Comparison. Pick the Best OS for your business or personal use from this list. An operating system (OS) is the program that, after being initially loaded into the computer by a boot program, manages all the other application programs in a computer. The application programs use the OS by requesting services through a defined application program interface (API). operating system (OS), program that manages a computer ’s resources, especially the allocation of those resources among other programs. Typical resources include the central processing unit (CPU), computer memory, file storage, input/output (I/O) devices, and network connections. OS Overview Introducing Siri AI. Truly helpful. Truly yours. iOS 27, iPadOS 27, macOS 27, watchOS 27, and visionOS 27 coming this fall. Siri AI coming in English later this year. AtlasOS is an optimized version of Windows, designed for enthusiasts and gamers. Experience faster performance, better privacy, and enhanced gaming capabilities. OS là gì? Hệ điều hành (OS) là một phần mềm quan trọng không thể thiếu trong mọi hệ thống máy tính và thiết bị di động. An Operating System (OS) is a software program that manages the hardware and software resources of a computer. It is like the manager of the computer that tells how other programs and hardware components work together. An operating system (OS) is system software that manages computer hardware and software resources, and provides common services for computer programs. [1] An OS is more than background software; it’s the heartbeat of your computer. At the most basic level, this is how operating systems work: they connect your hardware with your software, making sure your PC actually responds to you. An Operating System (OS) is a software that manages and handles hardware and software resources of a computing device. Manages computer resources such as CPU, memory, and files.