32bit 4Gb Memory Limit Explained

I found an interesting article that I thought was worth sharing. I have always been bugged when reading that 32bit operating systems were limited to 4Gb of memory because of the way memory is addressed. It never made any sense to me because when I took Windows XP classes it had a nice little table covering different versions of Windows in the back which showed certain 32bit versions allowing up to 128Gb of memory to be recognized.The book was written for taking Microsoft exams to earn a certification in XP and I also had another book of the same type for Server 03 again with the same table in the back. So if Microsoft is saying that 32bit is not limited to 4Gb why are people trying to say that the limit is because 32bit is not capable of addressing it?Because the standard 32bit home desktop versions of Windows are not licensed to allow more than 4Gb. The only reason you are limited is because Microsoft wrote the OS to limit you not because 32bit cannot address memory above 4Gb.