What is the difference btw personnel and staff? Are they interchangeable?
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personnel is used for business or government communications.
staff is used for business, government communications and all other things.
Is it right?
However, I've since worked places where "staff" simply means "all the people who work there."
Thanks, but that's what I have known.
1/What I don't know is when they are interchangeable, when they can't be interchangeable, clearly.
2/Besides, in library personnel staff, either personnel or staff is redundant (because both staff and personnel here refer to the same thing)? Is it right? If not, why?
It's not what you are asking, but I suspect that you will find the word 'employees' used in many places where an English learner might try to use 'staff' or 'personnel'.
Best wishes, Clive
Can I say library staff personnel ? If yes, library staff personnel = library personnel staff ?
People are waiting to help.