Circular connectors and cable connectors are used to connect cables to electronic devices, providing reliable and durable connections. Circular connectors are characterized by their cylindrical shape and multiple contact points, making them suitable for rugged and industrial applications. Cable connectors, including various types such as USB, HDMI, and Ethernet, provide standardized connections for data, power, and signal transmission. These connectors ensure secure and efficient connectivity in a wide range of applications, from consumer electronics to industrial automation.