title: The discovery of a class of high-temperature superconductors.
abstract: The exceptional interest in the new class of oxide superconductors and the importance of these materials are discussed together with the concepts that led to their discovery. The discovery itself and its early confirmation are summarized, including the work until the beginning of 1987. The observation of a superconductive glass state in percolative samples is also discussed.
authors.forename: K A
authors.initials: KA
authors.lastname: Müller
authors.forename: J G
authors.initials: JG
authors.lastname: Bednorz