This category lists makers of scientific instruments, with particular attention to those individuals who contributed to historical developments in instrument making.

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For example, the first person to invent a cloud chamber would be listed here, but a corporation that makes cloud chamber kits in bulk for schools would not, nor would corporations that specialize in modern scientific equipment. Bill Hewlett or David Packard might qualify for a specific instrument or instruments, but the Hewlett-Packard Company would not. For companies manufacturing scientific instruments, see Category:Instrument-making corporations.