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2. Kernel (operating system) - Wikipedia

   en.wikipedia.org/wiki/Kernel_(operating_system)

   Kernel (operating system) An oversimplification of how a kernel connects application software to the hardware of a computer. The kernel is a computer program at the core of a computer's operating system and generally has complete control over everything in the system. The kernel is also responsible for preventing and mitigating conflicts ...

3. Symbian - Wikipedia

   en.wikipedia.org/wiki/Symbian

   Proprietary software, [5] formerly Eclipse Public. Official website. symbian .nokia .com (defunct as of May 2014), symbian .org (defunct as of 2009–10) Support status. Unsupported. Symbian is a discontinued mobile operating system (OS) and computing platform designed for smartphones. [6]

4. Thread (computing) - Wikipedia

   en.wikipedia.org/wiki/Thread_(computing)

   In computer science, a thread of execution is the smallest sequence of programmed instructions that can be managed independently by a scheduler, which is typically a part of the operating system. [1] In many cases, a thread is a component of a process. The multiple threads of a given process may be executed concurrently (via multithreading ...

5. System call - Wikipedia

   en.wikipedia.org/wiki/System_call

   System call. A high-level overview of the Linux kernel's system call interface, which handles communication between its various components and the userspace. In computing, a system call (commonly abbreviated to syscall) is the programmatic way in which a computer program requests a service from the operating system [a] on which it is executed.

6. Operating system - Wikipedia

   en.wikipedia.org/wiki/Operating_system

   A real-time operating system (RTOS) is an operating system intended for applications with fixed deadlines ( real-time computing ). Such applications include some small embedded systems, automobile engine controllers, industrial robots, spacecraft, industrial control, and some large-scale computing systems.

7. Unix - Wikipedia

   en.wikipedia.org/wiki/Unix

   Unix ( / ˈjuːnɪks / ⓘ, YOO-niks; trademarked as UNIX) is a family of multitasking, multi-user computer operating systems that derive from the original AT&T Unix, whose development started in 1969 [1] at the Bell Labs research center by Ken Thompson, Dennis Ritchie, and others.

8. Operating environment - Wikipedia

   en.wikipedia.org/wiki/Operating_environment

   Operating environment. In computer software, an operating environment or integrated applications environment is the environment in which users run application software. The environment consists of a user interface provided by an applications manager and usually an application programming interface (API) to the applications manager.

9. Comparison of operating systems - Wikipedia

   en.wikipedia.org/wiki/Comparison_of_operating...

   The article "Usage share of operating systems" provides a broader, and more general, comparison of operating systems that includes servers, mainframes and supercomputers . Because of the large number and variety of available Linux distributions, they are all grouped under a single entry; see comparison of Linux distributions for a detailed ...