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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. Selenium dioxide - Wikipedia

    en.wikipedia.org/wiki/Selenium_dioxide

    Selenium dioxide is the chemical compound with the formula SeO 2. This colorless solid is one of the most frequently encountered compounds of selenium . It is used in making specialized glasses as well as a reagent in organic chemistry.

  4. Selenium rectifier - Wikipedia

    en.wikipedia.org/wiki/Selenium_rectifier

    A much thicker layer of selenium (50 to 60 μm) doped with a halogen is deposited on top of the thin metal plating. The selenium is then converted into polycrystalline gray (hexagonal) form by annealing. Cadmium selenide forms by reaction of the selenium with the tin-cadmium alloy and the CdSe-Se heterojunction is the

  5. Triggering device - Wikipedia

    en.wikipedia.org/wiki/Triggering_device

    Download QR code; Print/export Download as PDF; Printable version; In other projects ... A Triggering device is an electronic circuit, such as a Schmitt trigger, ...

  6. The best hiking shoes of 2025, according to hiking experts - AOL

    www.aol.com/lifestyle/best-hiking-shoes...

    The best hiking shoes from brands like Merrell, Keen, and Columbia provide stability and comfort while you explore the great outdoors.

  7. Webcam - Wikipedia

    en.wikipedia.org/wiki/Webcam

    A Logitech-branded webcam attached to a laptop. A webcam is a video camera which is designed to record or stream to a computer or computer network.They are primarily used in video telephony, live streaming and social media, and security.

  8. Project Excalibur - Wikipedia

    en.wikipedia.org/wiki/Project_Excalibur

    Instead of dozens of Excalibur weapons in pop-up launchers, Teller suggested that a single weapon in geostationary orbit "the size of an executive desk which applied this technology could potentially shoot down the entire Soviet land-based missile force if it were to be launched into the module's field of view."

  9. Wikipedia:Language learning centre/Word list - Wikipedia

    en.wikipedia.org/wiki/Wikipedia:Language...

    Drawing up a comprehensive list of words in English is important as a reference when learning a language as it will show the equivalent words you need to learn in the other language to achieve fluency.