1.\" $NetBSD: orders.7,v 1.5 2010/12/14 13:32:14 jruoho Exp $ 2.\" 3.\" Copyright (c) 2010 The NetBSD Foundation, Inc. 4.\" All rights reserved. 5.\" 6.\" This code is derived from software contributed to The NetBSD Foundation 7.\" by Jukka Ruohonen. 8.\" 9.\" Redistribution and use in source and binary forms, with or without 10.\" modification, are permitted provided that the following conditions 11.\" are met: 12.\" 1. Redistributions of source code must retain the above copyright 13.\" notice, this list of conditions and the following disclaimer. 14.\" 2. Redistributions in binary form must reproduce the above copyright 15.\" notice, this list of conditions and the following disclaimer in the 16.\" documentation and/or other materials provided with the distribution. 17.\" 18.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 19.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 20.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 21.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 22.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28.\" POSSIBILITY OF SUCH DAMAGE. 29.\" 30.Dd December 14, 2010 31.Dt ORDERS 7 32.Os 33.Sh NAME 34.Nm orders 35.Nd orders of magnitude 36.Sh DESCRIPTION 37The following table lists common multiples of bytes. 38.Bl -column -offset 2n \ 39"Kilobyte" "Prefix" "Power of 2" "Power of 10" 40.It Sy Name Ta Sy Prefix Ta Sy Power of 2 Ta Sy Power of 10 41.It Kilobyte Ta kB Ta 2^10 Ta 10^3 42.It Megabyte Ta MB Ta 2^20 Ta 10^6 43.It Gigabyte Ta GB Ta 2^30 Ta 10^9 44.It Terabyte Ta TB Ta 2^40 Ta 10^12 45.It Petabyte Ta PB Ta 2^50 Ta 10^15 46.It Exabyte Ta EB Ta 2^60 Ta 10^18 47.It Zettabyte Ta ZB Ta 2^70 Ta 10^21 48.It Yottabyte Ta YB Ta 2^80 Ta 10^24 49.El 50.Pp 51The following table lists common orders of magnitude as a power of ten. 52.Bl -column -offset 2n \ 53"Septillionth" "Order" "Prefix" "Symbol" "Decimal" 54.It Sy Name Ta Sy Order Ta Sy Prefix Ta Sy Symbol Ta Sy Decimal 55.It Septillionth Ta 10^-24 Ta yocto Ta y Ta 0.000000000000000000000001 56.It Sextillionth Ta 10^-21 Ta zepto Ta z Ta 0.000000000000000000001 57.It Quintillionth Ta 10^-18 Ta atto Ta a Ta 0.000000000000000001 58.It Quadrillionth Ta 10^-15 Ta femto Ta f Ta 0.000000000000001 59.It Trillionth Ta 10^-12 Ta pico Ta p Ta 0.000000000001 60.It Billionth Ta 10^-9 Ta nano Ta n Ta 0.000000001 61.It Millionth Ta 10^-6 Ta micro Ta mu Ta 0.000001 62.It Thousandth Ta 10^-3 Ta milli Ta m Ta 0.001 63.It Hundredth Ta 10^-2 Ta centi Ta c Ta 0.01 64.It Tenth Ta 10^-1 Ta deci Ta d Ta 0.1 65.It One Ta 10^0 Ta - Ta - Ta 1 66.It Ten Ta 10^1 Ta deca Ta da Ta 10 67.It Hundred Ta 10^2 Ta hecto Ta h Ta 100 68.It Thousand Ta 10^3 Ta kilo Ta k Ta 1000 69.It Million Ta 10^6 Ta mega Ta M Ta 1000000 70.It Billion Ta 10^9 Ta giga Ta G Ta 1000000000 71.It Trillion Ta 10^12 Ta tera Ta T Ta 1000000000000 72.It Quadrillion Ta 10^15 Ta peta Ta P Ta 1000000000000000 73.It Quintillion Ta 10^18 Ta exa Ta E Ta 1000000000000000000 74.It Sextillion Ta 10^21 Ta zetta Ta Z Ta 1000000000000000000000 75.It Septillion Ta 10^24 Ta yotta Ta Y Ta 1000000000000000000000000 76.El 77.Sh SEE ALSO 78.Xr units 1 , 79.Xr strsuftoll 3 , 80.Xr number 6 81.Sh STANDARDS 82There have been various attempts to standardize the set of binary prefixes. 83Organizations such as International Electrotechnical Commission 84.Pq Tn IEC 85have proposed new prefixes such as 86.Dq kibi , 87.Dq mebi , 88.Dq gibi , 89and 90.Dq yobi , 91but the adoption has been slow at best. 92