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  2. 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 ...

  3. 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 ...

  4. Systems theory - Wikipedia

    en.wikipedia.org/wiki/Systems_theory

    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.

  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. 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 ...

  7. Systems architecture - Wikipedia

    en.wikipedia.org/wiki/Systems_architecture

    A system architecture primarily concentrates on the internal interfaces among the system's components or subsystems, and on the interface (s) between the system and its external environment, especially the user. (In the specific case of computer systems, this latter, special, interface is known as the computer human interface, AKA human ...

  8. Functional decomposition - Wikipedia

    en.wikipedia.org/wiki/Functional_decomposition

    Functional Decomposition is a design method intending to produce a non-implementation, architectural description of a computer program. The software architect first establishes a series of functions and types that accomplishes the main processing problem of the computer program, decomposes each to reveal common functions and types, and finally ...

  9. Receiver operating characteristic - Wikipedia

    en.wikipedia.org/wiki/Receiver_operating...

    A receiver operating characteristic curve, or ROC curve, is a graphical plot that illustrates the performance of a binary classifier model (can be used for multi class classification as well) at varying threshold values. The ROC curve is the plot of the true positive rate (TPR) against the false positive rate (FPR) at each threshold setting.