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Impromptu (programming environment)
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<p>Impromptu is a <a href="/facts/Mac_OS_X/Y93vVpTm">Mac OS X</a> <a href="/facts/Computer_program/e38jH9N9">programming</a> environment for <a href="/facts/Live_coding/Vf9rTNDJ">live coding</a>. Impromptu is built around the <a href="/facts/Scheme_/0aGdf3SC">Scheme</a> language, which is a member of the <a href="/facts/Lisp_/xJHA3CrX">Lisp</a> family of languages. The source code of its core has been opened as the <a href="/facts/Extempore_(software)/u7PR0VNz">Extempore project</a>. </p>