Home site; lightweight, made to extend programs, often used for general-purpose, standalone use; simple procedural syntax, powerful data description constructs use associative arrays, extensible semantics; dynamically typed, bytecode interpreted, garb...
Overview from journal, by Roberto Ierusalimschy, Luiz Henrique de Figueiredo, Waldemar Celes Filho; Software: Practice and Experience, John Wiley and Sons, 1996.