In this part of ISO/IEC 80000 names@ symbols@ and definitions for quantities and units of telebiometrics related to human physiology are given. This part of ISO/IEC 80000 encompasses quantities and units for physiological@ biological or behavioural characteristics that might provide input or output to telebiometric identification or verification systems (recognition systems)@ including any known detection or safety thresholds. It also includes quantities and units concerned with effects on a human being caused by the use of a telebiometric device. NOTE The quantities and units@ their names and letter symbols@ specified here are those widely used in the disciplines and specialities related to telebiometrics: the telebiometric industry and telebiometry. Telebiometric units are SI units (see ISO 80000-1). A code and an associated graphical symbol for the identification of the type of a telebiometric device are also specified in this part of ISO/IEC 80000.