A User or An User?

[McLauchlan, Kevin]

Michael West had the audacity to say:
[...]
> By the way, there's no reason to capitalise "user" unless it's the
first
> word in a sentence.

In my world (crypto and information security stuff), "User" (along with
"Operator", "Administrator" and others) is a role, and not merely a
grab-bag non-specific collective noun.  So I capitalize at least some of
the time.

Kevin
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