Part Numbering - Micron MT48LC4M16A2TG-75 IT:G TR

What does the suffix IT or AT3 call out in Micron part numbers like MT48LC4M16A2TG-75 IT:G TR?

Operating temperature range Suffixes for Micron Technology. None = Commercial (0°C to +70°C) None IT = Industrial (–40°C to +85°C) AT3 = Automotive (–40°C to +105°C) This and other suffix information can be found on the first page of Micron’s datasheet.