Nuclear magnetic resonance
After World War II, the development of NMR as a technique in analytical chemistry and biochemistry happened at the same time as the development of electromagnetic technology and advanced electronics and their introduction into civilian use. In the 1960s, William Lipscomb was a pioneer in using NMR to study chemical structures. He worked out how to look at NMR data to tell what atoms are connected together in a molecule.  This is called chemical shift.