sentences:  In response to this need, BIOSIS developed the Index to Organism Names (ION), a free and freely accessible database that serves as an index to those names published in the Zoological Record.When BIOSIS was purchased by Thomson Reuters, ION was updated with names from additional databases, such as BIOSIS Previews and Biological Abstracts.Similar biological nomenclature organizations and databases exist, such as the Committee on Data for Science and Technology (CODATA), the Global Biodiversity Information Facility (GBIF), Species 2000, and the Taxonomic Database Working Group (TDWG).