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2. Coupon (PWB) - Wikipedia

   en.wikipedia.org/wiki/Coupon_(PWB)

   Coupon (PWB) A coupon or test coupon is a printed circuit board (PCB) used to test the quality of a printed wiring board (PWB) fabrication process. Test coupons are fabricated on the same panel as the PWBs, typically at the edges. Coupons are then inspected to ensure proper layer alignment, electrical connectivity, and cross sectioned to ...

3. Headphones - Wikipedia

   en.wikipedia.org/wiki/Headphones

   Wireless headphones. Headphones are a pair of small loudspeaker drivers worn on or around the head over a user's ears. They are electroacoustic transducers, which convert an electrical signal to a corresponding sound. Headphones let a single user listen to an audio source privately, in contrast to a loudspeaker, which emits sound into the open ...

4. List of emoticons - Wikipedia

   en.wikipedia.org/wiki/List_of_emoticons

   This is a list of emoticons or textual portrayals of a writer's moods or facial expressions in the form of icons. Originally, these icons consisted of ASCII art, and later, Shift JIS art and Unicode art. In recent times, graphical icons, both static and animated, have joined the traditional text-based emoticons; these are commonly known as emoji.

5. Rayvon - Wikipedia

   en.wikipedia.org/wiki/Rayvon

   Virgin. EMI [1] GTC. Website. rayvonmusic .com. Bruce Alexander Michael Brewster (born January 18, 1968), [2] better known by his stage name Rayvon, [3] is a Barbadian singer and songwriter, known for his work with Shaggy. [1] Born in Barbados, he was raised in Brooklyn, New York City. [4] He released his debut album, Hear My Cry in 1997. [5]

6. List of airline codes - Wikipedia

   en.wikipedia.org/wiki/List_of_airline_codes

   Main page; Contents; Current events; Random article; About Wikipedia; Contact us; Donate; Pages for logged out editors learn more

7. Noise-cancelling headphones - Wikipedia

   en.wikipedia.org/wiki/Noise-cancelling_headphones

   Noise -cancelling headphones alongside a carry case. Noise-cancelling headphones are headphones which suppress unwanted ambient sounds using active noise control. This is distinct from passive headphones which, if they reduce ambient sounds at all, use techniques such as soundproofing . Noise cancellation makes it possible to listen to audio ...