Source : Free On-Line Dictionary of Computing

kibibyte
     
         The official ISO[?] name for 1024 {bytes}, to
        distinguish it from 1000 bytes which they call a kilobyte.
        "Mebibyte", "Gibibyte", etc, are prefixes for other powers of
        1024.  Although this new naming standard has been widely
        reported in 2003, it seems unlikely to catch on.
     
        (2003-09-27)