ISO/IEC/IEEE 60559:2011 Information Technology

The IEC 60559:2011 international standard is equivalent to the IEEE 754-2008 standard for floating-point arithmetic, which is a major revision to IEEE 754-1985. … It specifies data interchange formats (which may or may not be arithmetic),

ISO/IEC/IEEE 60559:2011 Information Technology

including a 16-bit binary format and an unbounded tower of wider formats