Re: [Haskell-beginners] minimal Haskell concepts subset

There are a number of languages called "Mini Haskell" that will come up if you're lucky in a web search. One from Konstantin Läufer includes type classes, whereas the others seem to be just small, lazy functional languages. I think the Haskell history paper presented at HOPL considers type classes to be the defining feature or Haskell.