D-Subminiature, often referred to as D-sub, is a type of electrical connector used for data and power transmission. It features a distinctive D-shaped metal shell that provides mechanical support and alignment. D-subs come in various sizes and pin configurations, making them versatile for different applications, including computer interfaces and industrial equipment. These connectors are commonly found in devices like computers, monitors, and printers. They are known for their reliability and ease of use, with a simple locking mechanism that ensures a secure connection. D-subs are widely used in both commercial and industrial settings.