This category is for corporations notable for instrument-making as it applies to industrial and/or military applications. Their R&D work may involve basic science, inventing, and the building of one-off or prototype products, but their categorization is focused on their raison d'etre and overall character, which is applied science, manufacturing, and teams of people acting as an organization (versus individuals). The former aspects overlap with Category:Scientific instrument makers, but the latter aspects are what distinguish these corporations from historic individual inventors and scientists (which is what Category:Scientific instrument makers covers).