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Calculator spelling (also known as beghilos, the alphabet of available letters) is a technique of spelling words by reading characters upside-down from calculators equipped with certain kinds of seven-segment displays. It is a form of transformation of text. ==Description== An unintended characteristic of the seven-segment display is that many numbers, when read upside-down, resemble letters of the Latin alphabet. Each digit can be mapped to one or more letters, creating a limited but functional subset of the alphabet, including but not limited to: The graphic below illustrates with the sequence "250714638" appearing inverted as "BEghILOSZ": 200px Certain calculators omit the topmost stem on the digit "6" and the bottom-most stem on the "9". In such cases, "6" renders a lowercase "q" when turned upside-down, and "9" appears as a lowercase "b". Other variants of calculator spelling alphabets consider "0" to be a capital "D" instead of "O", "6" (not used in the standard Beghilos) as a lowercase "g" (as opposed to uppercase represented by 9) and "9" as either a reversed lowercase "a" or an at sign (@), both of which represent the letter A. Extending the available alphabet to hexadecimal notation (generally available on lower-end scientific calculators, though not on basic models), "b" and "d" correspond to "q" and "p" respectively. "F" transforms to t. A and C do not transform readily to recognizable letters. E transforms to 3. Upside-down A is W. Using leet, additional letters can be represented by combinations of letters (11/II or 2 (being very rare in English ) representing "two" or "to", 111/III representing "three", 15/SI, 935/SEa or 335/SEE for "C", etc.). This is generally rare and, especially in the last case (using a spelling-out of a letter) severely limits readability. Only certain calculators are capable of being used for beghilos calculator spelling. LCD, VFD, LED, and Panaplex displays are best for spelling words. The ability of dot-matrix displays, fourteen-segment and sixteen-segment displays to render most characters defeats the purpose of spelling with a limited alphabet. If the calculator is instead rotated 90 degrees counterclockwise from upright to create a vertical display, a different, but less useful, set of letters can be reproduced:, including but not limited to: If the calculator is instead rotated 90 degrees clockwise from upright to create a vertical display, ''still'' a different, but less useful, set of letters can be reproduced:, including but not limited to: Placing a calculator in front of a mirror produces the following character set, including but not limited to: Vertical 90° CW 90° CCW Upside-down: 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Calculator spelling」の詳細全文を読む スポンサード リンク
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