From owner-cvs-all  Sun Jan  6 12:21:21 2002
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Date: Sun, 6 Jan 2002 12:20:41 -0800
From: "Crist J. Clark" <cristjc@earthlink.net>
To: Jens Schweikhardt <schweikh@schweikhardt.net>
Cc: Garrett Wollman <wollman@khavrinen.lcs.mit.edu>,
	Matt Dillon <dillon@FreeBSD.org>, cvs-committers@FreeBSD.org,
	cvs-all@FreeBSD.org
Subject: Re: cvs commit: src/sys/isa sio.c
Message-ID: <20020106122041.C237@gohan.cjclark.org>
Reply-To: cjclark@alum.mit.edu
References: <200201060458.g064w9626629@freefall.freebsd.org> <200201060550.g065oGn35131@khavrinen.lcs.mit.edu> <20020106152104.A4955@schweikhardt.net>
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In-Reply-To: <20020106152104.A4955@schweikhardt.net>; from schweikh@schweikhardt.net on Sun, Jan 06, 2002 at 03:21:04PM +0100
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On Sun, Jan 06, 2002 at 03:21:04PM +0100, Jens Schweikhardt wrote:
> FYI,
> 
> # <mode type="anal-retentive">
> # The symbol for `second' is `s'.  `S' is `siemens', the unit of
> # conductivity.  When the Greek letter mu is not available, the prefix
> # `micro-' is symbolized `mc'.
> # 
> # The symbol for `hertz' is `Hz'.  `hz' is meaningless.
> # </mode>
> 
> There's even an easily remembered rule to capitalization of units (in
> Physics): if the unit is named after a person, it's capitalized, else in
> lower case. So we have capitalized Hertz, Volts, Faradays, Webers, Ohms,
> Siemens, Amperes, Ångströms, Coulombs, Watts, Newtons, Joules, Kelvins,
> etc and lowercased seconds, meters, parsecs, barns, ergs, etc.

Actually, the full names are NOT capitalized, "volt" is a unit of
electrostatic potential, "Volt" was a person. Your rule applies to
abbreviations only. The abbreviation for "volt" is "V."

See section 6.1.2:

  http://physics.nist.gov/Pubs/SP811/sec06.html

More info,

  http://physics.nist.gov/cuu/Units/

-- 
"It's always funny until someone gets hurt. Then it's hilarious."

Crist J. Clark                     |     cjclark@alum.mit.edu
                                   |     cjclark@jhu.edu
http://people.freebsd.org/~cjc/    |     cjc@freebsd.org

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