Sav Z DBMS is a Java-coded desktop ORDBMS featured by Z language - more efficient than SQL. The some peculiarities of Z database: dynamic structure, data integrity control, many-valued data, multi-level classification, class inheritance, and manipulation with multitudes of the classes or relations. Product consists of the next tools: 1. Z Interpreter. A development tool for Z language programming of a Z database. 2. Z Navigator. Allows to generate virtual tables via attribute names and values.