A DVI cable is used to transmit a digital video signal from a device such as a computer or DVD player to a display device such as a monitor, TV or projector. DVI stands for digital video interface. You can usually connect DVI devices to non-DVI devices using an adapter. They have 15 pins and small bolts for holding. In a world transitioning from analog and digital displays, DVI fits exactly that need. No one wants to change their DVD player and TV, computer and monitor, when they can just replace one. With DVI's ability to mix analog and digital signals, consumers and businesses can upgrade their hardware one by one at their own pace. DVI was an excellent system that could easily handle the 1920×1200 resolution, 60 Hz movies required for TVS and monitors at the time. A DVI cable is used to connect two DVI ports (e.g. between a computer and a monitor). Since DVI-I can transmit both digital and analog signals, an adapter can be used to connect the DVI port to a traditional VGA port or a modern HDMI port. The DVI interface is characterized by a matrix arrangement of square jacks, three high and eight horizontal, although different cables will have different pin arrangements (see the diagram below), but it is still easy to recognize. There is also a straight or cross-shaped notch on one side. Like VGA, DVI ports usually come with two threaded nuts, and the cables are bolted. The VGA connector has 15 pins and a curved trapezoidal shape. The HDMI port is low, the connector is barely visible, and there are no holding bolts.