Should MSDS be pluralized with an s? My initial reaction is to say No, because MSDS indicates it could be plural or singular — it stands for “Material Safety Data Sheets”.
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No less than OSHA uses MSDSs. MSDS's last S is Sheet.
This is also how we refer to them in the Emergency Department. Also:
If it is always used to mean sheets, plural, then I would not pluralize it again. If it normally stands for sheet, then I would pluralize it, in the same way I would pluralize STD's, SAM's, NGO's, etc.
My instinct would be to write MSDSes, following the general principle of attempting to handle initialisms (in which the letters are pronounced) according to their pronunciation, not their written appearance (as with "an MSDS", not "a MSDS").
protected by Community♦ Jul 24 '14 at 7:34
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