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We sometimes call them “octets”;
the terms as used here are interchangeable. When referring to longer lengths,
we use SI binary prefixes (as in “kibibytes”, “mebibytes”, and so on)
to refer unambiguously to increments of 1024 X bytes. If you encounter a reference
to “kilobytes”, “megabytes”, or so on,
you cannot safely infer whether the author intended
a decimal (1000 N ) or binary (1024 N ) interpretation.