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| | Operating system - Wikipedia, the free encyclopedia |
 | | Mainframe operating systems, such as IBM's z/OS, and embedded operating systems such as QNX, eCos, and PalmOS, are usually unrelated to Unix and Windows, except Windows CE, Windows NT Embedded 4.0 and Windows XP Embedded which are related to Windows and several *BSDs and Linux distributions tailored for the requirements of an embedded system. |
 | | As well as the kernel, an operating system is often distributed with tools for programs to display and manage a graphical user interface, as well as utility programs for tasks such as managing files and configuring the operating system. |
 | | The simplest computers, including the smallest embedded systems and many of the first computers did not have operating systems, and relied on the application programmer to manage the minimal hardware themselves, perhaps with the aid of libraries developed for the purpose. |
| en.wikipedia.org /wiki/Operating_system (1637 words) |
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