UNbiased random number generation
Often it's desirable have a series of random numbers that
meet the UNbiased condition of true randomness, but it doesn't
matter if they meet the unpredictable condition, and it can actually
be a plus to be able to reproduce the stream. A good example is a
monte-carlo simulation. For these tasks, a mind boggling amount of effort
has gone into creating the fastest, most compact pseudo-random subroutine.
here are links to just a few examples, written in 'C':
And here's an example program which answers most programmers
questions about using a pseudo random number generator.
If a generator is biased, it can also be fixed by
removing the bias.