<Tr> <Td> IUIS </Td> <Td> International Union of Immunological Societies </Td> <Td> 1976 </Td> <Td> Immunology </Td> </Tr> <Tr> <Td> IUMRS </Td> <Td> International Union of Materials Research Societies </Td> <Td> 2005 </Td> <Td> Materials science </Td> </Tr> <Tr> <Td> IUMS </Td> <Td> International Union of Microbiological Societies </Td> <Td> 1982 </Td> <Td> Microbiology </Td> </Tr> <Tr> <Td> IUNS </Td> <Td> International Union of Nutritional Sciences </Td> <Td> 1968 </Td> <Td> Nutrition </Td> </Tr>

The principal function of scientific societies is to