Gadgets collectively, or the practice of using or inventing gadgets and mechanical devices.
From gadget plus the suffix -ry (forming nouns of practice, place, or collection), likely from French 'gâchette.' Emerged in the 20th century to describe the culture and collection of small mechanical devices.
The word 'gadgetry' captures something culturally specific—it's not just about tools, but about a whole philosophy of innovation and cleverness, which is why it became shorthand for that optimistic mid-20th-century belief that human ingenuity could improve daily life.
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