Our workplaces are becoming less formal as the decor resembles what we have at home, companies relax dress codes, and technology makes it possible to work from anywhere.
But the old formality had some advantages, says Libby Sander from Bond University. For example, closed doors used to signal that you didn't want to be disturbed, and suits are an easy way to look professional.
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As Sander points out, new forms of office etiquette, such as not disturbing someone wearing headphones, are filling this void.