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  2. Pop-up ad - Wikipedia

    en.wikipedia.org/wiki/Pop-up_ad

    Pop-under ads are similar to pop-up ads, but the ad window appears hidden behind the main browser window rather than superimposed in front of it. As pop-up ads became more widespread and intrusive, often taking up the whole computer screen, many users would immediately close the pop-up ads that appeared over a site without looking at them.

  3. Flutter (software) - Wikipedia

    en.wikipedia.org/wiki/Flutter_(software)

    On December 4, 2018, Flutter 1.0 was released at the Flutter conference in London. [31] On May 6, 2020, the Dart software development kit version 2.8 and Flutter 1.17.0 were released, adding support for the Metal API. [32] On March 3, 2021, Google released Flutter 2 during an online Flutter Engage event.

  4. 2-pop - Wikipedia

    en.wikipedia.org/wiki/2-pop

    Used in television production and filmmaking post-production, a 2-pop is a 1 kHz tone that is one frame long and placed 2 seconds before the start of a program. It is a simple and effective method of ensuring synchronization between sound and picture in a video or film. [1] A 2-pop is typically placed at the end of a visual countdown. Only the ...

  5. Trigger strategy - Wikipedia

    en.wikipedia.org/wiki/Trigger_strategy

    In game theory, a trigger strategy is any of a class of strategies employed in a repeated non-cooperative game. A player using a trigger strategy initially cooperates but punishes the opponent if a certain level of defection (i.e., the trigger) is observed.