45b34f2cce
PR: 239020 Submitted by: gbe@ Approved by: imp@ Obtained from: NetBSD MFC after: 1 week Differential Revision: https://reviews.freebsd.org/D24293
112 lines
4.5 KiB
Groff
112 lines
4.5 KiB
Groff
.\" $NetBSD: orders.7,v 1.6 2011/08/06 11:07:18 jruoho Exp $
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.\"
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.\" Copyright (c) 2010 The NetBSD Foundation, Inc.
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.\" All rights reserved.
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.\"
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.\" This code is derived from software contributed to The NetBSD Foundation
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.\" by Jukka Ruohonen.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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.\" POSSIBILITY OF SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd August 6, 2011
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.Dt ORDERS 7
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.Os
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.Sh NAME
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.Nm orders
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.Nd orders of magnitude
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.Sh DESCRIPTION
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The following table lists common multiples of bytes.
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.Bl -column -offset 2n \
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"Kilobyte" "Prefix" "Power of 2" "Power of 10"
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.It Sy Name Ta Sy Prefix Ta Sy Power of 2 Ta Sy Power of 10
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.It Kilobyte Ta kB Ta 2^10 Ta 10^3
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.It Megabyte Ta MB Ta 2^20 Ta 10^6
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.It Gigabyte Ta GB Ta 2^30 Ta 10^9
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.It Terabyte Ta TB Ta 2^40 Ta 10^12
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.It Petabyte Ta PB Ta 2^50 Ta 10^15
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.It Exabyte Ta EB Ta 2^60 Ta 10^18
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.It Zettabyte Ta ZB Ta 2^70 Ta 10^21
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.It Yottabyte Ta YB Ta 2^80 Ta 10^24
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.El
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.Pp
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The following table lists common bit rates as a power of ten.
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.Bl -column -offset 2n \
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"Megabit per second" "Prefix" "Bit per second" "Byte per second"
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.It Sy Name Ta Sy Prefix Ta Sy Bit per second Ta Sy Byte per second
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.It Bit per second Ta bit/s Ta 1 Ta 0.125
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.It Byte per second Ta B/s Ta 8 Ta 1
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.It Kilobit per second Ta kbit/s Ta 10^3 Ta 125
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.It Kilobyte per second Ta kB/s Ta 8 * 10^3 Ta 1000
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.It Megabit per second Ta Mbit/s Ta 10^6 Ta 125000
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.It Megabyte per second Ta MB/s Ta 8 * 10^6 Ta 1000000
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.It Gigabit per second Ta Gbit/s Ta 10^9 Ta 125000000
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.It Gigabyte per second Ta GB/s Ta 8 * 10^9 Ta 1000000000
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.It Terabit per second Ta Tbit/s Ta 10^12 Ta 125000000000
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.It Terabyte per second Ta TB/s Ta 8 * 10^12 Ta 1000000000000
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.El
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.Pp
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The following table lists common orders of magnitude as a power of ten.
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.Bl -column -offset 2n \
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"Septillionth" "Order" "Prefix" "Symbol" "Decimal"
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.It Sy Name Ta Sy Order Ta Sy Prefix Ta Sy Symbol Ta Sy Decimal
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.It Septillionth Ta 10^-24 Ta yocto Ta y Ta 0.000000000000000000000001
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.It Sextillionth Ta 10^-21 Ta zepto Ta z Ta 0.000000000000000000001
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.It Quintillionth Ta 10^-18 Ta atto Ta a Ta 0.000000000000000001
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.It Quadrillionth Ta 10^-15 Ta femto Ta f Ta 0.000000000000001
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.It Trillionth Ta 10^-12 Ta pico Ta p Ta 0.000000000001
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.It Billionth Ta 10^-9 Ta nano Ta n Ta 0.000000001
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.It Millionth Ta 10^-6 Ta micro Ta mu Ta 0.000001
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.It Thousandth Ta 10^-3 Ta milli Ta m Ta 0.001
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.It Hundredth Ta 10^-2 Ta centi Ta c Ta 0.01
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.It Tenth Ta 10^-1 Ta deci Ta d Ta 0.1
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.It One Ta 10^0 Ta - Ta - Ta 1
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.It Ten Ta 10^1 Ta deca Ta da Ta 10
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.It Hundred Ta 10^2 Ta hecto Ta h Ta 100
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.It Thousand Ta 10^3 Ta kilo Ta k Ta 1000
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.It Million Ta 10^6 Ta mega Ta M Ta 1000000
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.It Billion Ta 10^9 Ta giga Ta G Ta 1000000000
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.It Trillion Ta 10^12 Ta tera Ta T Ta 1000000000000
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.It Quadrillion Ta 10^15 Ta peta Ta P Ta 1000000000000000
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.It Quintillion Ta 10^18 Ta exa Ta E Ta 1000000000000000000
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.It Sextillion Ta 10^21 Ta zetta Ta Z Ta 1000000000000000000000
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.It Septillion Ta 10^24 Ta yotta Ta Y Ta 1000000000000000000000000
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.El
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.Sh SEE ALSO
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.Xr units 1 ,
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.Xr number 6
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.Sh STANDARDS
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There have been various attempts to standardize the set of binary prefixes.
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Organizations such as International Electrotechnical Commission
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.Pq Tn IEC
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have proposed new prefixes such as
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.Dq kibi ,
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.Dq mebi ,
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.Dq gibi ,
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and
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.Dq yobi ,
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but the adoption has been slow at best.
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.Sh AUTHORS
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This manual page was written by
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.An Jukka Ruohonen Aq Mt jruoho@netbsd.org .
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