I don't get why you are being downvoted. Are people not familiar with the expression "get out of here" used in a friendly manner? Or do they really downvote you because they think it is so bad that you think that 1kB should be equal to 1000 bytes? I mean, I don't agree with you either but IMO the downvote should only be used for things that are either factually wrong, or which detract strongly from the conversation, or which contribute nothing at all. I think your comment is nice and it does not deserve to be downvoted.
Yeah, apparently downvotes can be used as a "disagree" signal. Usually when I see a comment being unfairly downvoted that way, I upvote as a counter-balance, even if I disagree with the argument (i.e., how many bytes in 1kB).
2.88MB was supported by most drives and was usable under Linux. You were supposed to use proper 2.88MB floppy, but you could usually get away with using a 1.44MB floppy and reformatting.
I'm not entirely sure how well they were supported under Windows though.
IIRC the Windows 95 install floppies were 2.88MB. With that in mind it's probably safe to assume that they were at least readable even in DOS, although I don't recall being able to format or write to a floppy at that capacity in any version of DOS/Windows.
A few month back I authoritatively stated that floppies allowed for 3.14Mb, understanding my mistake only a few minutes later and being thoroughly ashamed. Now I now there's some reason behind it, not just a random glitch of memory.
I don't know what storage medium that refers to. Plain old 3.5" floppies only went up to 1.44 MB.