Files with the NTF extension identify map files created by the Ordinance Survey agency of Great Britain. NTF files store vector image data used to generate and transfer map data. NTF files can be opened using the Ordinance Survey utility.
File used by Lotus Notes, a business collaboration software program often used by large enterprises; created by Lotus Notes developers and used for storing custom Lotus Notes modules that can integrate into the larger Lotus Notes infrastructure. NTF files can contain forms, source code, and other data used by the application.