Apple AirTag, Pack of 4
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Why so many? Because every stage of information processing required a human hand. In a mid-century organisation, a manager did not “write” a memo. He dictated it. A secretary took it down in shorthand, then retyped it. Then made copies. Then collated the copies by hand. Then distributed them. Then filed them. And so on and so on. Nothing moved unless someone physically moved it. There was no other way.