[time-nuts] 15 ns vs. 15 nS

[Jean-Louis Oneto]

Hi,
the rule is that only unit names derived from people's name are capitalized, 
hence Volt, Hertz, Siemens, Kelvin, Ampere, Joule, Coulomb, Farad, Watt...
The complete list can be found at:
http://www.bipm.org/en/si/si_brochure/chapter2/2-2/table3.html (english 
version)
Have a nice day,
Jean-Louis Oneto
OCA GEMINI - Avenue Copernic - 06130 Grasse - France
----- Original Message ----- 
From: "John Day" <johnday at wordsnimages.com>
To: "Discussion of precise time and frequency measurement" 
<time-nuts at febo.com>
Sent: Tuesday, May 22, 2007 11:42 AM
Subject: Re: [time-nuts] 15 ns vs. 15 nS


> At 04:05 AM 5/22/2007, Rob Kimberley wrote:
>>As Seconds are a fundamental unit of the SI system, shouldn't the "S" be
>>upper case?
>
> Of seven SI 'base units' only two - K for thermodynamic temperature
> and A for electrical current are capitalised. On the basis of your
> suggestion we would need to campaign for a change in 5 units, not just 
> one.
>
> John
>