> G stands for giga, exactly 1000 units.
Actually that is the meaning of K, as in Kb or KB. Giga is not for "1000 units" but for 1 bilion "units" or, for the power of 2 approximation 2^30 = 1,073,741,824.
I was just trying to be nice to the person who wrote the post I responded to.
It seemed to me that their post needed to distinguish between Gb, gigabit, and GB, gigabyte. Not strictly, of course, because in principle the post could have been correct with either Gb or GB. But usually communications speeds are in terms of bits, and file sizes in terms of bytes. So, monthly download limits are commonly in terms of bits or bytes -- i can't say. But the file sizes downloaded for Windows 10 are likely usually in terms of bytes. So, if Windows 10 needs 10 billion bytes, then that is 10 GB. Then that would need communications of about 80 Gb (less in case of data compression; more for overhead for TCP/IP, etc.). Or 10 Gb would be only 1.25 GB which seems small for copy or full update of Windows 10.
So, net, I was guessing that the Windows 10 size would be about 10 GB, not 10 Gb. Then for the communications limit, that could be in Gb or GB.
That is, I was responding to
> My 4Gb per month download limit doesn't like secret 10Gb downloads, that's what.
So, for Windows 10, the 10Gb should likely be 10 GB? Right? For the 4Gb, that might be correct but then it is only about 0.5 GB.
Yes, currently and at least back to IBM System/360, on systems from IBM, DEC VAX, Prime, Data General, Intel, and AMD, nearly always a byte has been 8 bits.
Yes, the original ASCII character set needed only 7 bits; the DEC PDP 10 had 36 bit words, and DEC commonly stored 5 ASCII characters in each word.
Communications speeds are commonly in terms of bits per second, and maybe communications data limits are also in terms of bits. File sizes are commonly in terms of bytes. So, maybe for communications, say Gb, and for file sizes, say GB.
Giga abbreviates 1 billion or 2^30 = 1,073,741,824.
Apparently some reader got totally torqued at me for trying to be nice. I was not asking for a tutorial on Gb versus GB but was trying nicely to suggest to the writer of the post I responded to that maybe they were not fully careful in using Gb versus GB.
MOD: I'm being attacked for no good reason. Please intervene and clean up these attacks.