SystemInitializer
This is the 1000000000000001 title used at factory. Process-name is "SystemInitializ", internally in strings it's referred to as "SystemInitializer".
Initial system installer: used to write/verify console specific calibration data such as asymmetric keys and write/verify NAND partitions from an initial installation image. Hence, this initializes the entire NAND. This includes an option for erasing NAND.