The content of this volume has been added to the online reference work Encyclopedia of Magnetic Resonance. For further information see Encyclopedia of Magnetic Resonance. This volume contains a historical article covering the development of NMR and ESR from the early beginnings, to the development of protein NMR and the development of MRI. This is followed by 200 historical articles arranged alphabetically by author, describing developments during the first 50 years of NMR and MRI techniques and applications.