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The exact phrase three-letter acronym appeared in the sociology literature in 1975. [1] Three-letter acronyms were used as mnemonics in biological sciences, from 1977 [2] and their practical advantage was promoted by Weber in 1982. [3] They are used in many other fields, but the term TLA is particularly associated with computing. [4]
At the end of the game there is a "Pyramid" which starts with a three-letter word. A letter appears in the line below to which the player must add the existing letters to find a solution. The pattern continues until the player reaches the final eight-letter anagram. The player wins the game by solving all the anagrams within the allotted time.
3 points: B ×2, P ×2, M ×1; 4 points: H ×3, F ×2, V ×2, W ×2, Y ×2; 5 points: K ×3; 8 points: J ×1; Absent in both the original and standard set of Afrikaans are the letters C, Q, X, and Z. The infrequent X and Z may still be represented by the use of a blank, yet the letters C and Q, not used in Afrikaans but only in a few loanwords ...
For some, an initialism [1] or alphabetism, connotes this general meaning, and an acronym is a subset with a narrower definition: an initialism pronounced as a word rather than as a sequence of letters. In this sense, NASA / ˈ n æ s ə / is an acronym but USA / j uː ɛ s ˈ eɪ / is not. [2] [3]
Specifically, letters largely correspond to phonemes as the smallest sound segments that can distinguish one word from another in a given language. [1] Not all writing systems represent language in this way: a syllabary assigns symbols to spoken syllables, while logographies assign symbols to words, morphemes, or other semantic units. [2] [3]
The California Job Case was a compartmentalized box for printing in the 19th century, sizes corresponding to the commonality of letters. The frequency of letters in text has been studied for use in cryptanalysis, and frequency analysis in particular, dating back to the Arab mathematician al-Kindi (c. AD 801–873 ), who formally developed the method (the ciphers breakable by this technique go ...
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In cryptography, a Caesar cipher, also known as Caesar's cipher, the shift cipher, Caesar's code, or Caesar shift, is one of the simplest and most widely known encryption techniques. It is a type of substitution cipher in which each letter in the plaintext is replaced by a letter some fixed number of positions down the alphabet.