i've been working in computers since at the industry level kilobytes are kb megabytes are mb gigabytes are gb terabytes are tb etc i've never been in any computer firm be it a game developer ibm apple a movie company or a technology company that uses mib or anything that kooky in fact my computer science professors will in the classes i've taken outright mark the paper a failure if anything but mb is used also kilobit megabit gigabit etc are as such kb mb gb etc the only place this mib junk is used in in wikipedia