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・ Operation Atlantis (film)
・ Operation Atlas
・ Operation Atlas (Mandatory Palestine)
・ Operation Atrina
・ Operation Attila
・ Operation Attila (World War II)
・ Operation Attleboro
・ Operating Passenger Railroad Stations Thematic Resource (New Jersey)
・ Operating point
・ Operating ratio
・ Operating reserve
・ Operating room management
・ Operating speed
・ Operating subsidiary
・ Operating surplus
Operating system
・ Operating system abstraction layer
・ Operating system advocacy
・ Operating System Embedded
・ Operating System Patcher
・ Operating System Projects
・ Operating system service management
・ Operating system Wi-Fi support
・ Operating table
・ Operating temperature
・ Operating theater
・ Operating Thetan
・ Operating weight
・ Operating-system-level virtualization
・ Operation


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Operating system : ウィキペディア英語版
Operating system

An operating system (OS) is system software that manages computer hardware and software resources and provides common services for computer programs. The operating system is a component of the system software in a computer system. Application programs usually require an operating system to function.
Time-sharing operating systems schedule tasks for efficient use of the system and may also include accounting software for cost allocation of processor time, mass storage, printing, and other resources.
For hardware functions such as input and output and memory allocation, the operating system acts as an intermediary between programs and the computer hardware, although the application code is usually executed directly by the hardware and frequently makes system calls to an OS function or is interrupted by it. Operating systems are found on many devices that contain a computer—from cellular phones and video game consoles to web servers and supercomputers.
Examples of popular modern operating systems include BlackBerry, BSD, iOS, Linux (Android, Chrome OS, Debian, Fedora, Gentoo, PCLinuxOS, RHEL ), OS X, QNX, Steam OS, Microsoft Windows (and variant Windows Phone),〔(【引用サイトリンク】 title=Operating System Market Share )〕 and z/OS. The first seven of these examples share roots in Unix. Popular hard real-time operating systems include FreeRTOS, Micrium and VxWorks.
==Types of operating systems==


抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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