The California Institute of Technology (Caltech) is a small, highly focused university located in Pasadena with a strong emphasis on the natural sciences and engineering. It has approximately 900 undergraduates, 1300 graduate students, and 300 faculty members. In spite of its small size, it has become one of the world's leading institutions of scientific research and education, counting 31 Nobel laureates among its alumni and faculty. Caltech also operates and manages the National Aeronautics and Space Administration (NASA)'s Jet Propulsion Laboratory (JPL), an autonomous-space-flight complex that oversees the design and operation of most of NASA's space-probes. (JPL is a CCST Federal Laboratory Affiliate.)