Funny story in that when Apple introduced the IPod, they had the random feature programmed to be random as you would expect. But, users hated it because they would get the same song replayed immediately after it was played (real randomness would do this, right?). So, Apple had to go into the software and reprogram it so it was no longer random but actually pseudo-random to ensure that once a song was played it was not played again until the rest of the songs were played in a random method