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2. List of North American Numbering Plan area codes - Wikipedia

   en.wikipedia.org/wiki/List_of_North_American...

   1993: split to create 905. 2001: overlaid by 647. 2013: overlaid by 437. 2025: overlaid by 942. area code 387 is reserved as a fifth code for the region. 417. Missouri ( Springfield, Joplin, Branson, Lamar, Lebanon, and most of southwestern Missouri) 1950. created from parts of the area codes 314 and 816.

3. International Code of Signals - Wikipedia

   en.wikipedia.org/wiki/International_Code_of_Signals

   The International Code of Signals ( INTERCO) is an international system of signals and codes for use by vessels to communicate important messages regarding safety of navigation and related matters. Signals can be sent by flaghoist, signal lamp ("blinker"), flag semaphore, radiotelegraphy, and radiotelephony. The International Code is the most ...

4. Lehmer code - Wikipedia

   en.wikipedia.org/wiki/Lehmer_code

   Lehmer code. In mathematics and in particular in combinatorics, the Lehmer code is a particular way to encode each possible permutation of a sequence of n numbers. It is an instance of a scheme for numbering permutations and is an example of an inversion table. The Lehmer code is named in reference to Derrick Henry Lehmer, but the code had been ...

5. Rayon - Wikipedia

   en.wikipedia.org/wiki/Rayon

   Rayon, also called viscose [1] and commercialised in some countries as sabra silk or cactus silk, [2] is a semi-synthetic fiber, [3] made from natural sources of regenerated cellulose, such as wood and related agricultural products. [4] It has the same molecular structure as cellulose.

6. Free! - Wikipedia

   en.wikipedia.org/wiki/Free!

   Voiced by: Atsushi Abe (Japanese); Parker Gray (English) Romio is a first-year student at Iwatobi High School and free-style swimmer who joins the Iwatobi High School Swim Club after Haruka and Makoto leave for university. Born in the US, he lives in Tokyo before coming to Iwatobi.

7. 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 ...