"Letter of Volatility" ez.analog.com/adieducation/university-program/f/q-a/565552/adalm-pluto-letter-of-volatility
"A Statement or Letter of Volatility is a specification issued by device manufacturers. Its main function is to outline the volatile and non-volatile nature of the memory on the device. Users can refer to this to comply with security requirements and as a guide when handling the device."