The Indo-European database, compiled on the basis of Walde-Pokorny's dictionary by S. L. Nikolayev. The Hittite and Tokharian reflexes were added by S. Starostin from the dictionaries of Friedrich, Tischler and Adams. As for subordinate databases: only Baltic and Germanic are ready so far, but the Slavic protoforms are directly linked to Vasmer's on-line etymological dictionary (that acts therefore as a Slavic etymological database). All etymologies are also linked - whenever it is possible - to Pokorny's on-line etymological dictionary.