The NLS Data Installation utility which helps you convert text-format updates to NLS objects that you create or receive with a new Oracle distribution to binary format. It also aids you in merging these converted files into the existing NLS object set.
The NLS Configuration utility which helps you configure your NLS boot files so that only the NLS objects that you require will be loaded.
NLS Calendar utility which allows you to update existing NLS calendar data with additional ruler eras (imperial calendars) or add deviation days (lunar calendar).