DVDs are based on the UDF format and CD-R and CD-RW disks use UDF as an optional second standard. UDF, defined by the Optical Technology Storage Association (OTSA), is a subset of ISO 13346, an interchange standard for non-sequential recording of data.
The user interface or humanâmachine interface is the part of the machine that handles the humanâmachine interaction. Membrane switches, rubber keypads and touchscreens are examples of the physical part of the Human Machine Interface which we can see and touch.
The user interface of a mechanical system, a vehicle or an industrial installation is sometimes referred to as the humanâmachine interface (HMI). HMI is a modification of the original term MMI (man-machine interface).