There are 2 file types use the .NBP file extension:
1. Mathematica Player Notebook File
Notebook file created by Mathematica, a program used for scientific and mathematical computations; may contain text, graphics, sound, calculations, and user interface components; used to store analysis results as an interactive document.
NBP files are similar to .NB files, but are "signed" and can be played with the free Mathematica Player. Both file types are saved using 7-bit ASCII text.
Updated: June 3, 2014
2. NeoBook Plugin File
Plug-in used by NeoBook, a program that allows users to create and publish Windows software; contains added functions for building NeoBook applications, such as components for database connections, file management, and multimedia file playback.
After a plug-in is installed, users can access the new functionality through the "Insert Action" list in the NeoBook development environment. NeoBook plug-ins can be created by third party developers and sold through the NeoSoft website.
Updated: February 25, 2010