The Paul Scherrer Institute (PSI) is a multi-disciplinary research institute which belongs to the Swiss Federal Institutes of Technology Domain covering also ETH Zurich and EPFL. It was established in 1988 through the merger of EIR (Eidgenössisches Institut für Reaktorforschung, Federal Institute for Reactor Research, established in 1960) and SIN (Schweizerisches Institut für Nuklearphysik, Swiss Institute for Nuclear Physics, established in 1968). It is based in Villigen and Würenlingen.