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- In telecommunication, a commercial code is a code once used to save on cablegram costs. Telegraph (and telex) charged per word sent, so companies which sent large volumes of telegrams developed codes to save money on tolls. Elaborate commercial codes which encoded complete phrases into single words were developed and published as codebooks of thousands of phrases and sentences with corresponding codewords. Commercial codes were not generally intended to keep telegrams private, as codes were widely published; they were usually cost-saving measures only. Many general-purpose codes, such as the Acme Code and the ABC Code, were published and widely used between the 1870s and the 1950s, before the arrival of transatlantic telephone calls and next-day airmail rendered them obsolete. Numerous special-purpose codes were also developed and sold for fields as varied as aviation, car dealerships, insurance, and cinema, containing words and phrases commonly used in those professions. These codes turned complete phrases into single words (commonly of five letters). These were not always genuine words; for example, codes contained "words" such as BYOXO ("Are you trying to weasel out of our deal?"), LIOUY ("Why do you not answer my question?"), BMULD ("You're a skunk!"), or AYYLU ("Not clearly coded, repeat more clearly."). (en)
- On désigne sous le nom de code commercial des procédés destinés à chiffrer pour dissimuler le sens et à réduire le coût des télécommunications télégraphiques, utilisés aux XIXe et XXe siècles. Actuellement ces codes ne sont plus destinés à protéger le secret de la correspondance. (fr)
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- On désigne sous le nom de code commercial des procédés destinés à chiffrer pour dissimuler le sens et à réduire le coût des télécommunications télégraphiques, utilisés aux XIXe et XXe siècles. Actuellement ces codes ne sont plus destinés à protéger le secret de la correspondance. (fr)
- In telecommunication, a commercial code is a code once used to save on cablegram costs. Telegraph (and telex) charged per word sent, so companies which sent large volumes of telegrams developed codes to save money on tolls. Elaborate commercial codes which encoded complete phrases into single words were developed and published as codebooks of thousands of phrases and sentences with corresponding codewords. Commercial codes were not generally intended to keep telegrams private, as codes were widely published; they were usually cost-saving measures only. (en)
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- Commercial code (communications) (en)
- Code commercial (cryptologie) (fr)
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