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  2. Systems analysis - Wikipedia

    en.wikipedia.org/wiki/Systems_analysis

    System analysis researchers apply methodology to the systems involved, forming an overall picture. System analysis is used in every field where something is developed. Analysis can also be a series of components that perform organic functions together, such as systems engineering. Systems engineering is an interdisciplinary field of engineering ...

  3. Systems theory - Wikipedia

    en.wikipedia.org/wiki/Systems_theory

    v. t. e. Systems theory is the transdisciplinary [ 1] study of systems, i.e. cohesive groups of interrelated, interdependent components that can be natural or artificial. Every system has causal boundaries, is influenced by its context, defined by its structure, function and role, and expressed through its relations with other systems.

  4. Operating system - Wikipedia

    en.wikipedia.org/wiki/Operating_system

    An operating system ( OS) is system software that manages computer hardware and software resources, and provides common services for computer programs . 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, peripherals, and ...

  5. Functional requirement - Wikipedia

    en.wikipedia.org/wiki/Functional_requirement

    Functional requirements may involve calculations, technical details, data manipulation and processing, and other specific functionality that define what a system is supposed to accomplish. [ 2] Behavioral requirements describe all the cases where the system uses the functional requirements, these are captured in use cases.

  6. Structured systems analysis and design method - Wikipedia

    en.wikipedia.org/wiki/Structured_systems...

    Structured systems analysis and design method. Structured systems analysis and design method ( SSADM) is a systems approach to the analysis and design of information systems. SSADM was produced for the Central Computer and Telecommunications Agency, a UK government office concerned with the use of technology in government, from 1980 onwards.

  7. Real-time operating system - Wikipedia

    en.wikipedia.org/wiki/Real-time_operating_system

    A real-time operating system ( RTOS) is an operating system (OS) for real-time computing applications that processes data and events that have critically defined time constraints. An RTOS is distinct from a time-sharing operating system, such as Unix, which manages the sharing of system resources with a scheduler, data buffers, or fixed task ...

  8. Computer case - Wikipedia

    en.wikipedia.org/wiki/Computer_case

    The fans are also at the rear and front. The power supply is on the bottom rear. A computer case, also known as a computer chassis, is the enclosure that contains most of the hardware of a personal computer. The components housed inside the case (such as the CPU, motherboard, memory, mass storage devices, power supply unit and various expansion ...

  9. The purpose of a system is what it does - Wikipedia

    en.wikipedia.org/wiki/The_purpose_of_a_system_is...

    The purpose of a system is what it does. The purpose of a system is what it does ( POSIWID) is a systems thinking heuristic coined by Stafford Beer, [ 1] who observed that there is "no point in claiming that the purpose of a system is to do what it constantly fails to do." [ 2] The term is widely used by systems theorists, and is generally ...