Quote Originally Posted by thevmax View Post
Memory chips are normally only available as part of a card called a module. You've probably seen memory listed as 8x32 or 4x16. These numbers represent the number of the chips multiplied by the capacity of each individual chip, which is measured in megabits (Mb), or one million bits. Take the result and divide it by eight to get the number of megabytes on that module. For example, 4x32 means that the module has four 32-megabit chips. Multiply 4 by 32 and you get 128 megabits. Since we know that a byte has 8 bits, we need to divide our result of 128 by 8. Our result is 16 megabytes.

Just because an operating system uses some of the memory is no reason to specify the total memory as less.
There needs to be a consistent reference of memory for comparison sake as well.
What if the next version of your operating system used Less Memory than the current one?
What if you switched from using Windows to using Ubuntu? (You would have more usable memory.)
If the manufacturer allocated specific memory for the operating system, what happens when the user installs a newer operating system that is too big for the memory?

Yes I know how memory is configured and sold as. Thank you for pointing out my miss use of the word "memory" instead of disk space when talking about floppy disks!