NDR may refer to any of the following:
1. Short for non-destructive readout, NDR or NDRO is a function that prevents any data previously read from being erased from its source. For example, a computer processor does not destroy data after reading it.
3. Short for non-active, dormant, to be temoved, NDR is a database and document abbreviation for a file, record, or other data that needs to be removed because it is no longer being used.