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What's the best way to describe your level of skill in particular technologies (languages, platforms, OS, ...) when polishing your CV ?
Assume we are talking about the short CV of the kind where you don't spell out every project and system you have worked on in the past, but still want the reader to get a general appreciation of how well you master each topic.
Can you suggest a set of labels which is unambiguous but sufficiently general to be understood across the industry?