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  2. dc (computer program) - Wikipedia

    en.wikipedia.org/wiki/Dc_(computer_program)

    dc (desk calculator) is a cross-platform reverse-Polish calculator which supports arbitrary-precision arithmetic. [1] It was written by Lorinda Cherry and Robert Morris at Bell Labs. [2] It is one of the oldest Unix utilities, preceding even the invention of the C programming language. Like other utilities of that vintage, it has a powerful set ...

  3. Mental calculation - Wikipedia

    en.wikipedia.org/wiki/Mental_calculation

    Sum the digits of 500702: 5 + 0 + 0 + (7 + 0 + 2 = 9, which counts as 0) = 5; 5 = 5, so there is a good chance that the prediction that 6,338 × 79 equals 500,702 is right. The same procedure can be used with multiple operations, repeating steps 1 and 2 for each operation.

  4. List of computer algebra systems - Wikipedia

    en.wikipedia.org/wiki/List_of_computer_algebra...

    The following tables provide a comparison of computer algebra systems (CAS). [1] [2] [3] A CAS is a package comprising a set of algorithms for performing symbolic manipulations on algebraic objects, a language to implement them, and an environment in which to use the language.

  5. Usage share of operating systems - Wikipedia

    en.wikipedia.org/wiki/Usage_share_of_operating...

    But that 1 billion figure can and should be compared to the numbers Microsoft touts for Windows 10 (200 million, most recently) or Windows more generally (1.5 billion active users, a number that hasn’t moved, magically, in years), and that Google touts for Android (over 1.4 billion, as of September).

  6. Microsoft Windows - Wikipedia

    en.wikipedia.org/wiki/Microsoft_Windows

    The PC Settings app in Windows 8.1 and Windows Server 2012 R2 also includes a counterpart settings page for this. Changing the interface language also changes the language of preinstalled Windows Store apps (such as Mail, Maps and News) and certain other Microsoft-developed apps (such as Remote Desktop). The above limitations for language packs ...

  7. List of best-selling PC games - Wikipedia

    en.wikipedia.org/wiki/List_of_best-selling_PC_games

    This is a list of personal computer games (video games for personal computers, including those running Windows, macOS, and Linux) that have sold or shipped at least one million copies. If a game was released on multiple platforms, the sales figures list are only for PC sales.

  8. Market share of personal computer vendors - Wikipedia

    en.wikipedia.org/wiki/Market_share_of_personal...

    The annual worldwide market share of personal computer vendors includes desktop computers, laptop computers, and netbooks but excludes mobile devices, such as tablet computers that do not fall under the category of 2-in-1 PCs.

  9. Hewlett-Packard - Wikipedia

    en.wikipedia.org/wiki/Hewlett-Packard

    HP paid $10.3 billion for 87.3% of the shares, valuing Autonomy at around $11.7 billion (£7.4 billion) overall, a premium of around 79% over market price. The deal was widely criticized as "absurdly high", a "botched strategy shift" and a "chaotic" attempt to rapidly reposition HP and enhance earnings, [ 77 ] [ 79 ] [ 80 ] and had been ...