MB it usually refers to GiB or MiB respectively". September: HP 3PAR StoreServ Storage best practices guide uses binary prefixes for storage and decimal prefixes for speed. 2019 The BIPM publishes the 9th SI brochure, confirming the position from its 8th brochure (published in 2006), with the note "The SI prefixes refer strictly to powers of 10. They should not be used to indicate powers of 2 [...]" 2020s 2020 A Californian court finds that, as the NIST specifies that prefixes such as "G" are decimal rather than binary, and that California law specifies that the NIST definitions of measure "shall govern ... transactions in this state", and because the vendor of a 64 GB flash drive with 64 billion bytes indicated on the packaging of the drive that 1 GB = 1,000,000,000 bytes, they did not deceive consumers into believing that the drive had 64×1024×1024×1024 bytes. 2021 Ainslie, Halvorsen and Robinson point out the parallel with the confusion between a one-third octave and a one-tenth decade in acoustics. "The near coincidence between ten octaves and three decades (210 ≈ 103) is identical to the one that causes confusion in the computer industry by use of the term “kilobyte” to mean 1024 B ... when the internationally accepted use of the prefix kilo requires it to mean 1000 B." 2022 November: The additional decimal prefixes ronna- for 10009 and quetta- for 100010 were adopted by the International Bureau of Weights and Measures (BIPM). Binary counterparts to ronna- and quetta- were suggested in a consultation paper of the International Committee for Weights and Measures' Consultative Committee for Units (CCU) as robi- (Ri, 10249) and quebi- (Qi, 102410), but so far they have not been adopted by the IEC or ISO. References B Units of information