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Comment Re:Really? Quicktime? Seriously? (Score 1) 320

There's an important distinction in English between "is used by" and "is in use by".

"Is used by" means that a program which might not currently be running requires the use of that software, whereas "is in use by" means that that program is running.

You can detect the former, but without some kind of well-designed central registry (!) you can't detect the latter.

"Spock, did you see the looks on their faces?" "Yes, Captain, a sort of vacant contentment."