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  2. Roblox - Wikipedia

    en.wikipedia.org/wiki/Roblox

    Roblox is an online game platform and game creation system built around user-generated content and games, [1] [2] officially referred to as "experiences". [3] Games can be created by any user through the platform's game engine, Roblox Studio, [4] and then shared to and played by other players. [1]

  3. QR code payment - Wikipedia

    en.wikipedia.org/wiki/QR_code_payment

    A QR code payment is a mobile payment method where payment is performed by scanning a QR code from a mobile app. [1] This is an alternative to doing electronic funds transfer at point of sale using a payment terminal. [2]

  4. Fast inverse square root - Wikipedia

    en.wikipedia.org/wiki/Fast_inverse_square_root

    Lighting and reflection calculations, as in the video game OpenArena, use the fast inverse square root code to compute angles of incidence and reflection.. Fast inverse square root, sometimes referred to as Fast InvSqrt() or by the hexadecimal constant 0x5F3759DF, is an algorithm that estimates , the reciprocal (or multiplicative inverse) of the square root of a 32-bit floating-point number in ...

  5. Amateur radio - Wikipedia

    en.wikipedia.org/wiki/Amateur_radio

    The point at which power output is measured may also affect transmissions. The United Kingdom measures at the point the antenna is connected to the signal feed cable, which means the radio system may transmit more than 400 W to overcome signal loss in the cable; conversely, Germany measures power at the output of the final amplification stage ...

  6. Computer - Wikipedia

    en.wikipedia.org/wiki/Computer

    Read the code for the next instruction from the cell indicated by the program counter. Decode the numerical code for the instruction into a set of commands or signals for each of the other systems. Increment the program counter so it points to the next instruction.

  7. Bitcoin - Wikipedia

    en.wikipedia.org/wiki/Bitcoin

    XBT, a code that conforms to ISO 4217 though not officially part of it, [63] is used by Bloomberg L.P. [64] No uniform capitalization convention exists; some sources use Bitcoin , capitalized, to refer to the technology and network , and bitcoin , lowercase, for the unit of account. [ 65 ]

  8. Vacuum tube - Wikipedia

    en.wikipedia.org/wiki/Vacuum_tube

    Later thermionic vacuum tubes, mostly miniature style, some with top cap connections for higher voltages. A vacuum tube, electron tube, [1] [2] [3] thermionic valve (British usage), or tube (North America) [4] is a device that controls electric current flow in a high vacuum between electrodes to which an electric potential difference has been applied.

  9. Liverpool - Wikipedia

    en.wikipedia.org/wiki/Liverpool

    The smallest ITL 3 area classed as Liverpool (code TLD72), therefore, had a population of 486,100 at the 2021 Census. Other definitions At the 2021 Census, the ONS used a refreshed concept of built-up areas (BUAs) based on the physical built environment, using satellite imagery to recognise developed land, such as cities, towns, and villages.