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  2. Numeric precision in Microsoft Excel - Wikipedia

    en.wikipedia.org/wiki/Numeric_precision_in...

    Excel maintains 15 figures in its numbers, but they are not always accurate; mathematically, the bottom line should be the same as the top line, in 'fp-math' the step '1 + 1/9000' leads to a rounding up as the first bit of the 14 bit tail '10111000110010' of the mantissa falling off the table when adding 1 is a '1', this up-rounding is not undone when subtracting the 1 again, since there is no ...

  3. Mode (user interface) - Wikipedia

    en.wikipedia.org/wiki/Mode_(user_interface)

    Emacs – has the concept of "prefix keys", which trigger a modal state by pressing the control key plus a letter key. Emacs then waits for additional keypresses that complete a keybinding. This differs from vi in that the mode always ends as soon as the command is called (when the sequence of key presses that activates it is completed). Emacs ...

  4. Bomb (icon) - Wikipedia

    en.wikipedia.org/wiki/Bomb_(icon)

    These were a common sight, and Mac users of the era might need a paper clip(if the Programmer's Key wasn't installed) in order to restart the computer since the onscreen restart button would usually be nonfunctional.

  5. 80 of the Most Useful Excel Shortcuts - AOL

    www.aol.com/lifestyle/80-most-useful-excel...

    Here are 9 Mac keyboard shortcuts every Mac user should know. Formatting and editing cells Formatting cells using Excel shortcuts is a lot faster than choosing options from menus.

  6. User error - Wikipedia

    en.wikipedia.org/wiki/User_error

    Phrases used by the tech savvy to mean that a problem is caused entirely by the fault of the user include PEBKAC [8] (an acronym for "problem exists between keyboard and chair"), PEBCAK [9] (an alternative, but similar, acronym for "problem exists between chair and keyboard"), POBCAK (a US government/military acronym for "problem occurs between ...

  7. Scancode - Wikipedia

    en.wikipedia.org/wiki/Scancode

    The most commonly encountered are the "XT" ("set 1") scancodes, based on the 83-key keyboard used by the IBM PC XT and earlier. These mostly consist of a single byte; the low 7 bits identify the key, and the most significant bit is clear for a key press or set for a key release. Some additional keys have an E0 (or rarely, E1 or E2) prefix.

  8. Alt key - Wikipedia

    en.wikipedia.org/wiki/Alt_key

    The Alt key on a Lenovo laptop keyboard ISO keyboard symbol for “Alternate” The Alt keyAlt (pronounced / ɔː l t / AWLT or / ʌ l t / ULT) on a computer keyboard is used to change (alternate) the function of other pressed keys. Thus, the Alt key is a modifier key, used in a similar fashion to the Shift key.

  9. Command key - Wikipedia

    en.wikipedia.org/wiki/Command_key

    However, it was still an Apple II. Apple changed the keys on the IIGS's keyboard to Command and Option, as on Mac keyboards, but added an open-Apple to the Command key, for consistency with applications for previous Apple II generations. (The Option key did not have a closed-Apple, probably because Apple II applications used the closed-Apple ...