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2. Square-free integer - Wikipedia

   en.wikipedia.org/wiki/Square-free_integer

   In mathematics, a square-free integer (or squarefree integer) is an integer which is divisible by no square number other than 1. That is, its prime factorization has exactly one factor for each prime that appears in it. For example, 10 = 2 ⋅ 5 is square-free, but 18 = 2 ⋅ 3 ⋅ 3 is not, because 18 is divisible by 9 = 32.

3. Square (financial services) - Wikipedia

   en.wikipedia.org/wiki/Square_(financial_services)

   Square is a point-of-sale system for businesses with physical or online stores. [1][2] Launched in 2009 by Block, Inc., [3] it enables sellers to accept card payments and manage various business operations. As of 2023, Square leads the U.S. point-of-sale systems market, [4][5][6] serving 4 million sellers and processing $210bn annually. [7][8]

4. Mean free path - Wikipedia

   en.wikipedia.org/wiki/Mean_free_path

   Mean free path. Average distance travelled by a moving particle between impacts with other particles. In physics, mean free path is the average distance over which a moving particle (such as an atom, a molecule, or a photon) travels before substantially changing its direction or energy (or, in a specific context, other properties), typically as ...

5. Payment card interchange fee and merchant discount antitrust ...

   en.wikipedia.org/wiki/Payment_Card_Interchange...

   The payment card interchange fee and merchant discount antitrust litigation is a United States class-action lawsuit filed in 2005 by merchants and trade associations against Visa, Mastercard, and numerous financial institutions that issue payment cards. The suit was filed because of price fixing and other allegedly anti-competitive trade ...

6. AOL Mail

   mail.aol.com

   You can find instant answers on our AOL Mail help page. Should you need additional assistance we have experts available around the clock at 800-730-2563.

7. Square foot - Wikipedia

   en.wikipedia.org/wiki/Square_foot

   Comparison of 1 square foot with some Imperial and metric units of area. The square foot (pl. square feet; abbreviated sq ft, sf, or ft 2; also denoted by ' 2 and ⏍) is an imperial unit and U.S. customary unit (non-SI, non-metric) of area, used mainly in the United States and partially in Canada, the United Kingdom, Bangladesh, India, Nepal, Pakistan, Ghana, Liberia, Malaysia, Myanmar ...

8. Royalty payment - Wikipedia

   en.wikipedia.org/wiki/Royalty_payment

   Royalty payment. A royalty payment is a payment made by one party to another that owns a particular asset, for the right to ongoing use of that asset. Royalties are typically agreed upon as a percentage of gross or net revenues derived from the use of an asset or a fixed price per unit sold of an item of such, but there are also other modes and ...

9. Free-space path loss - Wikipedia

   en.wikipedia.org/wiki/Free-space_path_loss

   Free-space path loss. In telecommunications, the free-space path loss (FSPL) (also known as free-space loss, FSL) is the attenuation of radio energy between the feedpoints of two antennas that results from the combination of the receiving antenna's capture area plus the obstacle-free, line-of-sight (LoS) path through free space (usually air). [1]