.NSF File Extension
File Type 1NES Sound Format File
File format categories include Binary, Text, XML, and Zip. The format of this file type has not been determined.
Music file from an original Nintendo (NES/Famicom) game; allows music from Nintendo games to be played without loading the actual game; can be opened by a variety of NSF players.
File Type 2Lotus Notes Database
This file is saved in a binary format, which requires a specific program to read its contents.
Database file used by IBM Lotus business software; saved in the Notes Storage Facility (NSF) format, which stores data in document units called "notes;" used for storing collaborative business information such as mail and calendar data.
NSF files are often hosted by a Lotus Domino server, and they can be downloaded by Lotus Notes clients in order to work with a fully functional database in offline mode. If the client makes changes to the database, Domino includes the facilities to synchronize the changes back to the master database. NSF files can also be used for the process of data replication.
NOTE: NSF files may also serve as a Domino Web application that is hosted on a Web server, where the URL has a trailing ".nsf" string. These files include the Domino Web Service Design Element, which enables Web access.