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LSE (programming language)
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<p>LSE is a <a href="/facts/Programming_language/cWTYbgWa">programming language</a> developed at <a href="/facts/Sup%C3%A9lec/NIXXm1pB">Supélec</a> and <a href="/facts/Schneider_Electric/8DEQxsAw">Télémécanique</a> from the late 1960s to the mid-1970s. It is similar to <a href="/facts/BASIC/VYMl5TmA">BASIC</a>, except with <a href="/facts/French_language/qe1DnaQh">French</a>-language instead of <a href="/facts/English_language/tpkxGt7b">English</a>-language keywords. It was derived from an earlier language called <i>LSD</i>, also developed at Supélec. It is most commonly said to be an acronym for <i>Langage Symbolique d'Enseignement</i> (Symbolic Teaching Language), but other expansions are also known (e.g. <i>Langage de Sup-Élec</i>, or the more cynical <i>Langage Sans Espoir</i> (hopeless language)). </p><p>LSE originally flourished because being "interpreted", the "tokens" used were common to all languages and with a nationalized "editor", tokenized programs could be listed in any language. Obviously, the support from the <a href="/facts/Ministry_of_National_Education_(France)/S7FHcYEu">French Ministry of National Education</a>, was very important, but it declined as the ministry lost interest. It went through a number of revisions; earlier versions of LSE lacked full support for <a href="/facts/Structured_programming/zA8b8dP1">structured programming</a>, later versions such as LSE-83 (aka LSE-1983) by Jacques Arsac added structured programming support, along with <a href="/facts/Exception_handling/VrJxgb9r">exception handling</a>. Even later revisions, such as LSE-2000, added more functionality, new types, new operators (NI, ET QUE, OU QUE and SELON-DANS-SINON), flow control commands, etc. </p>