[setlX](http://setlX.randoom.org/) is an interpreter for the high level programming-language SetlX (set language extended) .  The most distinguishing feature of this language is the support it offers for sets and lists. As set theory is the language of mathematics, many mathematical algorithms that are formulated in terms of set theory have very straightforward implementations in SetlX.  Designed mostly by [Karl Stroetmann](http://wwwlehre.dhbw-stuttgart.de/~stroetma/), the SetlX language is an evolution of Setl by Jack Schwartz. It was specifically conceived to make the unique features of Setl more accessible to today’s computer science students.