A 19" rack is a standard unit of measurement for equipment racks used in the telecommunication, audio, and information technology industries. A 19-inch rack refers to the width of the equipment mounting panel, which is 19 inches (48.3 cm) wide.

Rack accessories include items such as rackmount shelves, cable management systems, rackmount power strips, and blanking panels, among others. These accessories are designed to enhance the functionality and organization of equipment in a rack.