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  2. Logical spreadsheet - Wikipedia

    en.wikipedia.org/wiki/Logical_spreadsheet

    A logical spreadsheet is a spreadsheet in which formulas take the form of logical constraints rather than function definitions.. In traditional spreadsheet systems, such as Excel, cells are partitioned into "directly specified" cells and "computed" cells and the formulas used to specify the values of computed cells are "functional", i.e. for every combination of values of the directly ...

  3. Conditional (computer programming) - Wikipedia

    en.wikipedia.org/wiki/Conditional_(computer...

    If-then-else flow diagram A nested if–then–else flow diagram. In computer science, conditionals (that is, conditional statements, conditional expressions and conditional constructs) are programming language constructs that perform different computations or actions or return different values depending on the value of a Boolean expression, called a condition.

  4. Installable File System - Wikipedia

    en.wikipedia.org/wiki/Installable_File_System

    IFSHLP.SYS (the Installable File System Helper) is an MS-DOS device driver that was first released as part of Microsoft Windows for Workgroups 3.11. It enables native 32-bit file access in Windows 386 Enhanced Mode by bypassing the 16-bit DOS API and ensuring that no other real mode driver intercepts INT 21h calls.

  5. IFS AB - Wikipedia

    en.wikipedia.org/wiki/IFS_AB

    IFS AB (Industrial and Financial Systems) is a multinational enterprise software company headquartered in Linköping, Sweden. IFS has over 7,000 employees in more than 80 countries. IFS has over 7,000 employees in more than 80 countries.

  6. If and only if - Wikipedia

    en.wikipedia.org/wiki/If_and_only_if

    The corresponding logical symbols are "", "", [6] and , [10] and sometimes "iff".These are usually treated as equivalent. However, some texts of mathematical logic (particularly those on first-order logic, rather than propositional logic) make a distinction between these, in which the first, ↔, is used as a symbol in logic formulas, while ⇔ is used in reasoning about those logic formulas ...

  7. Institute for Fiscal Studies - Wikipedia

    en.wikipedia.org/wiki/Institute_for_Fiscal_Studies

    The Institute for Fiscal Studies (IFS) is an independent [1] [2] [3] economic research institute based in London, United Kingdom, which specialises in UK taxation and public policy. [4] It produces both academic and policy-related findings.

  8. Integrated Forecast System - Wikipedia

    en.wikipedia.org/wiki/Integrated_Forecast_System

    It comprises a spectral atmospheric model with a terrain-following vertical coordinate system coupled to a 4D-Var data assimilation system.In 1997 the IFS became the first operational forecasting system to use 4D-Var. [2] Both ECMWF and Météo-France use the IFS to make operational weather forecasts, but using a different configuration and resolution (the Météo-France configuration is ...

  9. Internal Family Systems Model - Wikipedia

    en.wikipedia.org/wiki/Internal_Family_Systems_Model

    The Internal Family Systems Model (IFS) is an integrative approach to individual psychotherapy developed by Richard C. Schwartz in the 1980s. [ 1 ] [ 2 ] It combines systems thinking with the view that the mind is made up of relatively discrete subpersonalities , each with its own unique viewpoint and qualities.