I think Scheme?

docs/WhyScheme.md

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+# Why Scheme?
+
+First of all, it's a Lisp.
+
+Universal (implemented for many platforms, many times.)
+
+Venerable (around for a long time, still going strong.  Roots in deep places.)
+
+Simple.  (Language and implementation.)
+
+Well documented.  (SICP, 'nuff said.  But etc. & et. al.)
+
+Unconventional but uncontroversial.
+
+Compile and REPL.
+
+(Optional strong typing.)
+
+Because it's old and well-used it has everything ("Batteries Included" or
+easily available.)
+
+Compact and elegant code.
+
+Ooo!  And it makes a nice _target_ for compiling Joy expressions!
+
+The Numeric Tower!
+