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Reference.org
Language for Systems Development
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<p> The Language for Systems Development (LSD) was a programming language developed in 1971 at <a href="/facts/Brown_University/o9MRu4jx">Brown University</a> for the <a href="/facts/IBM_System%2f360/7znvpy4K">IBM System/360</a>. The language was also referred to as LSyD due to the negative connotations of the acronym <a href="/facts/Lysergic_acid_diethylamide/o5qq0grH">"LSD"</a> at the time. LSD was derived from <a href="/facts/PL%2fI/469mVYgd">PL/I</a>. </p>