Will Harris:No, it's quite reasonable to say that it doesn't make sense.
Bluray is only one word so that it could be easier to trademark.
Come on, it's pretty obviously two words. Blue and Ray. BRD or BR would make just as much sense. Certainly you're not alone in being perplexed as to the use of BD whenever Bluray is mentioned. The mind sees the addition of the word "disk" as arbitrary. It's the "Blu Ray" bit that matters. They're all disks of some sort after all.
Sorry Will, I don't understand your reasoning there. We all call compact discs, CDs. The "disc" is very much needed. No one says I bought a great compact at the weekend or I love that Digital Video. In a few years time, when BD is familiar to the masses, we will all be saying, "I bought a great BD at the weekend", not "I bought a great Bluray at the weekend".