48 billion bits / 2 bits = 24 billion bits.
That is wrong if you are going to be anal and adhere to computer memory storage standards
48 billion bits / 2 bits = 24 billion HALF NIBBLES or 24 billion SEMI-NIBBLES
(
http://en.wikipedia.org/wiki/Nibble)
=> The term "semi-nibble" is used to refer to a 2-bit collection, or half a nibble
48 billion bits is 48 million bits if you section in 2 bits which are HALF NIBBLES then you have 24 billion HALF NIBBLES or 24 billion SEMI-NIBBLES
But see that would be trolling anal when I really did get what you meant although what you wrote was wrong according to the industry standard we are anally adhering to.
I do however get how you derived the figure now.
Trolling on analness is so easy my snookie wookie but all the analness is getting me hot and bothered.