DBSN ¿ it is an easy and light NoSQL database. It is focused on the solution of numerous practical problems. In this book there is presented the main majority of DBSN database functions with examples. There are given ways for DBSN usage in different programming environments: VBA, Python, VBS, Jscript, Delphi, C++. The DBSN is used as MVC model. The content is extremely detailed. Main methods are described for MS Excel. For other environments there are given only solutions for simple problems, but that is enough for further extension of the application. Large amount of DBSN functions are beyond the book bounds. But in the book there are given enough data for its usage in application programming. The book is designed for a wide range of programmers including beginners.