The Quant firm Jane Street uses Ocaml and built Core [1], an alternative to the Ocaml standard lib. I wouldn't be surprised if their business domain benefits fr

The Quant firm Jane Street uses Ocaml and built Core [1], an alternative to the Ocaml standard lib. I wouldn't be surprised if their business domain benefits from FP. Also demonware [2], which is owned by Acitivision/Blizzard and manages online game lobbies for all their titles (ie Call of Duty series across all platforms), uses Erlang. They switched from C++ to Erlang before Call of Duty Black Ops was released. They said if they hadn't decided to switch before the release the company would have never been able to handle the 5 months of user growth the game brought to their platform [3]. [1] https://github.com/janestreet/core https://github.com/janestreet/core [2] https://www.demonware.net/ https://www.demonware.net/ [3] https://news.ycombinator.com/item?id=14120506 https://news.ycombinator.com/item?id=14120506