So a 1 megabyte file (as reported by the file system) is actually 1048576 bytes, which technically - sorry, I mean pedantically - speaking, is 1 mebibyte.

To make matters worse, disk manufacturers use the decimal prefixes, so our nice 1 terabyte drive is 931 mebibytes, but is reported by the file system as 931 megabytes (not MiB).

Finally, memory manufacturers use the binary prefix, so 1 megabyte of RAM is actually 1 mebibyte (1048576 bytes).

A bit of a mess, no?

All the above is, IMHO, a consequence of imprecision. If we get used to being loose with our terminology, we risk carrying that attitude over into our work product, with sometimes regrettable results.

So I'll continue to strive to be pedantic (translation: precise).