A Sciences Classifying scheme in Ancient Iran according to the Iranian Bundahish

This study seeks to extract a scheme of science classification in Iranian ancient texts.
A historical approach, in resources and existing documents.
Findings: Iranians have a bright scientific background, but many of their scientific resources was destroyed over the time. The Iranian Bundahish is one of the most important sources from ancient Iranian, that has a classification scheme of sciences which has more realistic and pragmatic aspect than philosophically; that understandable with a comprehensive view. As the first taxonomic scheme was presented in this book.
These sciences classification scheme can be extract according to the threefold presupposition contained in this paper. Because this is a realistic and pragmatic scheme, instead of considering the totality of the science the second layer of the classification scheme and the dimensions of each science field considered.