stream-processing

What are some practical problems that parallel computing, f#, and GPU-parallel processing might solve.

Recently WiFi encryption was brute forced by using the parellel processing power of the modern GPU http://is.gd/4fhb. What other real-life problems do you think will benefit from similar techniques? ...

Return character to stdin in Ocaml

is there an equivalent to (C++) istream::putback(char) for ocaml? How could I add a character to the beginning of stdin? ...