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.
Interactions = Social. 1  Conventional user interaction and user interface approaches address the user's interaction with the device. 2  The designer designs the screen. 3  The interaction is UserâSoftware. 4  The Social Interaction Designer also designs beyond screen. 5  The interaction of UserâSoftwareâUser.