The natural stable isotopes of forty‐three elements, comprising 177 different nuclides, have been enriched; the goal is to enrich 257 isotopes of fifty‐nine elements. The isotopic enrichments, the operation of the production mass spectrographs including a listing of best charge materials, a brief review of the chemical and analytical problems, a tabulation of the best compounds of the separated isotopes for mass spectrometer analyses, and a listing of some of the major uses of separated isotopes have been included in this survey of the electromagnetic isotope separation program.