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<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"/><title>2.4&nbsp;Other Experimental Languages</title><link rel="stylesheet" type="text/css" href="../scribble.css" title="default"/><link rel="stylesheet" type="text/css" href="../manual-style.css" title="default"/><link rel="stylesheet" type="text/css" href="../manual-racket.css" title="default"/><link rel="stylesheet" type="text/css" href="../doc-site.css" title="default"/><script type="text/javascript" src="../scribble-common.js"></script><script type="text/javascript" src="../manual-racket.js"></script><script type="text/javascript" src="../doc-site.js"></script><script type="text/javascript" src="../local-redirect/local-redirect.js"></script><script type="text/javascript" src="../local-redirect/local-user-redirect.js"></script><!--[if IE 6]><style type="text/css">.SIEHidden { overflow: hidden; }</style><![endif]--></head><body id="doc-racket-lang-org"><div class="tocset"><div class="tocview"><div class="tocviewlist tocviewlisttopspace"><div class="tocviewtitle"><table cellspacing="0" cellpadding="0"><tr><td style="width: 1em;"><a href="javascript:void(0);" title="Expand/Collapse" class="tocviewtoggle" onclick="TocviewToggle(this,&quot;tocview_0&quot;);">&#9658;</a></td><td></td><td><a href="index.html" class="tocviewlink" data-pltdoc="x">Dr<span class="mywbr"> &nbsp;</span>Racket:<span class="mywbr"> &nbsp;</span> The Racket Programming Environment</a></td></tr></table></div><div class="tocviewsublisttop" style="display: none;" id="tocview_0"><table cellspacing="0" cellpadding="0"><tr><td align="right">1&nbsp;</td><td><a href="interface-essentials.html" class="tocviewlink" data-pltdoc="x">Interface Essentials</a></td></tr><tr><td align="right">2&nbsp;</td><td><a href="languages.html" class="tocviewselflink" data-pltdoc="x">Languages</a></td></tr><tr><td align="right">3&nbsp;</td><td><a href="Interface_Reference.html" class="tocviewlink" data-pltdoc="x">Interface Reference</a></td></tr><tr><td align="right">4&nbsp;</td><td><a href="extending-drracket.html" class="tocviewlink" data-pltdoc="x">Extending Dr<span class="mywbr"> &nbsp;</span>Racket</a></td></tr><tr><td align="right"></td><td><a href="doc-index.html" class="tocviewlink" data-pltdoc="x">Index</a></td></tr></table></div></div><div class="tocviewlist"><table cellspacing="0" cellpadding="0"><tr><td style="width: 1em;"><a href="javascript:void(0);" title="Expand/Collapse" class="tocviewtoggle" onclick="TocviewToggle(this,&quot;tocview_1&quot;);">&#9660;</a></td><td>2&nbsp;</td><td><a href="languages.html" class="tocviewlink" data-pltdoc="x">Languages</a></td></tr></table><div class="tocviewsublistbottom" style="display: block;" id="tocview_1"><table cellspacing="0" cellpadding="0"><tr><td align="right">2.1&nbsp;</td><td><a href="module.html" class="tocviewlink" data-pltdoc="x">Language Declared in Source</a></td></tr><tr><td align="right">2.2&nbsp;</td><td><a href="legacy.html" class="tocviewlink" data-pltdoc="x">Legacy Languages</a></td></tr><tr><td align="right">2.3&nbsp;</td><td><a href="htdp-langs.html" class="tocviewlink" data-pltdoc="x"><span style="font-style: italic">How to Design Programs</span> Teaching Languages</a></td></tr><tr><td align="right">2.4&nbsp;</td><td><a href="" class="tocviewselflink" data-pltdoc="x">Other Experimental Languages</a></td></tr><tr><td align="right">2.5&nbsp;</td><td><a href="output-syntax.html" class="tocviewlink" data-pltdoc="x">Output Printing Styles</a></td></tr></table></div></div></div></div><div class="maincolumn"><div class="main"><div class="navsettop"><span class="navleft"><form class="searchform"><input class="searchbox" style="color: #888;" type="text" value="...search manuals..." title="Enter a search string to search the manuals" onkeypress="return DoSearchKey(event, this, &quot;6.1&quot;, &quot;../&quot;);" onfocus="this.style.color=&quot;black&quot;; this.style.textAlign=&quot;left&quot;; if (this.value == &quot;...search manuals...&quot;) this.value=&quot;&quot;;" onblur="if (this.value.match(/^ *$/)) { this.style.color=&quot;#888&quot;; this.style.textAlign=&quot;center&quot;; this.value=&quot;...search manuals...&quot;; }"/></form>&nbsp;&nbsp;<a href="../index.html" title="up to the documentation top" data-pltdoc="x" onclick="return GotoPLTRoot(&quot;6.1&quot;);">top</a></span><span class="navright">&nbsp;&nbsp;<a href="htdp-langs.html" title="backward to &quot;2.3 How to Design Programs Teaching Languages&quot;" data-pltdoc="x">&larr; prev</a>&nbsp;&nbsp;<a href="languages.html" title="up to &quot;2 Languages&quot;" data-pltdoc="x">up</a>&nbsp;&nbsp;<a href="output-syntax.html" title="forward to &quot;2.5 Output Printing Styles&quot;" data-pltdoc="x">next &rarr;</a></span>&nbsp;</div><h4 x-source-module="(lib &quot;scribblings/drracket/drracket.scrbl&quot;)" x-part-tag="&quot;experimental-langs&quot;">2.4<tt>&nbsp;</tt><a name="(part._experimental-langs)"></a>Other Experimental Languages</h4><p>For information on <span class="ssansserif">Lazy Racket</span>, see <a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?tag=%28part._%28.%27%28lib._lazy%2Flazy..scrbl%29.%27._.%27top.%27%29%29&amp;version=6.1" class="Sq" data-pltdoc="x">the Lazy Racket documentation</a>.</p><p>For information on <span class="ssansserif">FrTime</span>, see <a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?tag=%28part._%28.%27%28lib._frtime%2Fscribblings%2Ffrtime..scrbl%29.%27._.%27top.%27%29%29&amp;version=6.1" class="Sq" data-pltdoc="x">the FrTime documentation</a>.</p><p>For information on <span class="ssansserif">Algol 60</span>, see <a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?tag=%28part._%28.%27%28lib._algol60%2Falgol60..scrbl%29.%27._.%27top.%27%29%29&amp;version=6.1" class="Sq" data-pltdoc="x">the Algol 60 documentation</a>.</p><div class="navsetbottom"><span class="navleft"><form class="searchform"><input class="searchbox" style="color: #888;" type="text" value="...search manuals..." title="Enter a search string to search the manuals" onkeypress="return DoSearchKey(event, this, &quot;6.1&quot;, &quot;../&quot;);" onfocus="this.style.color=&quot;black&quot;; 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