The English-Russian and Russian-English volume each contain about 50,000 terms covering various fields and subfields of nuclear engineering and technology: nuclear physics, thermonuclear research, nuclear reactors, nuclear fuel, isotopes, radiation, reliability and safety issues, environmental protection, emergency issues, radiation hazards. Terms from the military nuclear field are also included, as well as the names of nuclear power plants and nuclear societies worldwide. The English-Russian dictionary also contains a comprehensive section of about 6,500 abbreviations; a list of about 250 abbreviations is included in the Russian-English volume.