I don't own a current copy and don't see a need for one.  The SI Brochure, and 
NIST SP330 and SP811 suffice for my purposes and heavily overlap the content.
 
However, I had a copy in the early 70's.  I was helping the electronics company 
I worked for then go metric, in addition to my regular engineering duties.  As 
I recall, it had some information helpful to organizations transitioning from 
Customary or dual to metric, particularly on rounding.
(Rounding nominal or target values is pretty straightforward; rounding minimum 
and maximums from specs requires either rounding "specward" or some engineering 
judgementor both.)
 
I don't feel it is needed in organizations that ARE metric, but that is a 
personal opinion and others may feel differently.  Also, it is (at least 
partially) out of date whenever a new edition of the SI Brochure comes out.  It 
takes time for the NIST and ANSI publications to catch up.
(although revisions from 7th to 8th SI Brochure are not earthshaking)

--- On Fri, 4/17/09, Jeremiah MacGregor <[email protected]> 
wrote:

From: Jeremiah MacGregor <[email protected]>
Subject: [USMA:44717] Re: IEEE/ASTM SI-10
To: "U.S. Metric Association" <[email protected]>
Date: Friday, April 17, 2009, 10:04 PM






Why pay for a publication from the ANSI when the same information is available 
for free from the BIPM.
 
http://www.bipm.org/en/si/
 
Jerry



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