What is 1 u?

1u is a unit of measurement commonly used in computing hardware design and layout. It stands for "one unit" and is equivalent to a height of 1.75 inches (44.45mm) and a width of 19 inches (482.6mm). It is used to describe the size of rack-mounted equipment such as servers, switches, and patch panels, and is also used to measure the height of individual components within these devices. 1u is a standard size that allows for easy installation and compatibility between different manufacturers' products.