Do you remember those bits and bytes? Here we go again.

Do you remember those bits and bytes?
Long long time ago, Well it is not so long ago actually.

There were no Internet, and not even BBS.
There were not even much PC out there,

Uncle Bill claim that
"640KiB ought to be enough for anybody. - 1981"
http://tickletux.wordpress.com/2007/02/20/did-bill-gates-say-the-640k-line/

(1 KiB = 1024 Byte)
http://en.wikipedia.org/wiki/Kilobyte

Well here we go again.
You just bought a new machine that has 4GiB RAM. Then you checked the System Info. Hey! Where is my 4GiB of RAM??????



Here's the problem,
http://www.codinghorror.com/blog/archives/000811.html

So, where did Uncle Bill get his idea that 32 bit barrier is 2GiB
http://csclub.uwaterloo.ca/media/1989%20Bill%20Gates%20Talk%20on%20Microsoft.html
At 24:18, He mentioned about IBM Mainframe with 2GiB of RAM that uses 31 bit addressing space.