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  2. Memory refresh - Wikipedia

    en.wikipedia.org/wiki/Memory_refresh

    Experiments show that in a typical off-the-shelf DRAM chip, only a few weak cells really require the worst-case 64 ms refresh interval, [14] and even then only at the high end of its specified temperature range. At room temperature (e.g. 24 °C (75 °F)), those same weak cells need to be refreshed once every 500 ms for correct operation.

  3. Switch access scanning - Wikipedia

    en.wikipedia.org/wiki/Switch_Access_Scanning

    In automatic (regular or interrupted) scanning, the indicator scans in the preset pattern on its own and item selection occurs when the scanner hits a switch. [5] [7] In step scanning, the user controls each movement (or step) of the scanning indicator through its preset pattern by hitting a switch. To select an item, the AAC user hits a second ...

  4. Comparison of tablet computers - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_tablet_computers

    Windows XP Tablet PC Edition, Windows Vista Business Certified for SUSE Linux Enterprise Desktop 10 and Novell Linux Desktop 9 SP3 Intel Core Duo T2300E, T2400, T2500, T2600 / Intel Core 2 Duo T5600, T7200, T7400 1.66-2.13 +32, 64 60-120 .5, 1, 2 (max 4) 5.5 (6-cell) 1.35 Un­known HP Compaq 2710p [269] Hewlett-Packard 1.68 12.1 1280 × 800

  5. Microsoft Tablet PC - Wikipedia

    en.wikipedia.org/wiki/Microsoft_Tablet_PC

    HP Compaq tablet PC with rotating/removable keyboard. Microsoft Tablet PC is a term coined by Microsoft for tablet computers conforming to hardware specifications, devised by Microsoft, and announced in 2001 for a pen-enabled personal computer and running a licensed copy of the Windows XP Tablet PC Edition operating system or a derivative thereof.

  6. Android version history - Wikipedia

    en.wikipedia.org/wiki/Android_version_history

    Ability to turn off notifications on an application-specific basis. Shortcuts and widgets can automatically be re-arranged or re-sized to allow new items to fit on home screens. Bluetooth data transfer for Android Beam. Tablets with smaller screens now use an expanded version of the interface layout and home screen used by phones. [117]

  7. Book scanning - Wikipedia

    en.wikipedia.org/wiki/Book_scanning

    Book scanning or book digitization (also: magazine scanning or magazine digitization) is the process of converting physical books and magazines into digital media such as images, electronic text, or electronic books (e-books) by using an image scanner. [1] Large scale book scanning projects have made many books available online. [2]

  8. Watchdog timer - Wikipedia

    en.wikipedia.org/wiki/Watchdog_timer

    When activated, the fail-safe circuitry forces all control outputs to safe states (e.g., turns off motors, heaters, and high-voltages) to prevent injuries and equipment damage while the fault persists. In a two-stage watchdog, the first timer is often used to activate fail-safe outputs and start the second timer stage; the second stage will ...

  9. Image scanner - Wikipedia

    en.wikipedia.org/wiki/Image_scanner

    Alexander Murray and Richard Morse invented and patented the first analog color scanner at Eastman Kodak in 1937. Intended for color separation at printing presses, their machine was an analog drum scanner that imaged a color transparency mounted in the drum, with a light source placed underneath the film, and three photocells with red, green, and blue color filters reading each spot on the ...