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  2. Roblox - Wikipedia

    en.wikipedia.org/wiki/Roblox

    October 10, 2023 [8] Genre (s) Game creation system, massively multiplayer online. Mode (s) Single-player, multi-player. Roblox ( / ˈroʊblɒks / ROH-bloks) is an online game platform and game creation system developed by Roblox Corporation that allows users to program and play games created by themselves or other users.

  3. Gift card - Wikipedia

    en.wikipedia.org/wiki/Gift_card

    A gift card, also known as a gift certificate in North America, or gift voucher or gift token in the UK, [1] is a prepaid stored-value money card, usually issued by a retailer or bank, to be used as an alternative to cash for purchases within a particular store or related businesses. Gift cards are also given out by employers or organizations ...

  4. David Baszucki - Wikipedia

    en.wikipedia.org/wiki/David_Baszucki

    David Baszucki ( / bəˈzuːki /; born January 20, 1963), also known by his Roblox username david.baszucki, formerly builderman, is a Canadian-born American entrepreneur, engineer, and software developer. He is best known as the co-founder and CEO of Roblox Corporation. He previously co-founded and served as the CEO of Knowledge Revolution ...

  5. QR code - Wikipedia

    en.wikipedia.org/wiki/QR_code

    The QR code system was invented in 1994, at the Denso Wave automotive products company, in Japan. The initial alternating-square design presented by the team of researchers, headed by Masahiro Hara, was influenced by the black counters and the white counters played on a Go board; the pattern of position detection was found and determined by applying the least-used ratio (1:1:3:1:1) in black ...

  6. Gray card - Wikipedia

    en.wikipedia.org/wiki/Gray_card

    A gray card is a flat object of a neutral-gray color that derives from a flat reflectance spectrum. A typical example is the Kodak R-27 set, which contains one 8 in × 10 in (20 cm × 25 cm) card and one 4 in × 5 in (10 cm × 13 cm) card, each with an 18% reflectance across the visible spectrum, and a white reverse side with a 90% reflectance.

  7. Credit card - Wikipedia

    en.wikipedia.org/wiki/Credit_card

    Portal. v. t. e. A credit card is a payment card, usually issued by a bank, allowing its users to purchase goods or services or withdraw cash on credit. Using the card thus accrues debt that has to be repaid later. [1] Credit cards are one of the most widely used forms of payment across the world.

  8. Gift economy - Wikipedia

    en.wikipedia.org/wiki/Gift_economy

    A gift economy or gift culture is a system of exchange where valuables are not sold, but rather given without an explicit agreement for immediate or future rewards. Social norms and customs govern giving a gift in a gift culture; although there is some expectation of reciprocity, gifts are not given in an explicit exchange of goods or services ...

  9. Card counting - Wikipedia

    en.wikipedia.org/wiki/Card_counting

    Design and selection of systems. The primary goal of a card counting system is to assign point values to each card that roughly correlate to the card's "effect of removal" or EOR (that is, the effect a single card has on the house advantage once removed from play), thus enabling the player to gauge the house advantage based on the composition of cards still to be dealt.