The Texas Advanced Computing Center (TACC) at the University of Texas at Austin, United States, is an advanced computing research center that provides comprehensive advanced computing resources and support services to researchers in Texas and across the US. The mission of TACC is to enable discoveries that advance science and society through the application of advanced computing technologies. Specializing in high performance computing, scientific visualization, data analysis & storage systems, software, research & development and portal interfaces, TACC deploys and operates advanced computational infrastructure to enable computational research activities of faculty, staff, and students of UT Austin. TACC also provides consulting, technical documentation, and training to support researchers who use these resources. TACC staff members conduct research and development in applications and algorithms, computing systems design/architecture, and programming tools and environments. Founded in 2001, TACC is one of the centers of computational excellence in the United States. Through the National Science Foundation (NSF) Extreme Science and Engineering Discovery Environment (XSEDE) project, TACC’s resources and services are made available to the national academic research community. TACC is located on UT's J. J. Pickle Research Campus. TACC collaborators include researchers in other UT Austin departments and centers, at Texas universities in the High Performance Computing Across Texas Consortium, and at other U.S. universities and government laboratories. Projects TACC research and development activities are supported by several federal programs, including: NSF XSEDE (formerly Teragrid) Program Funded by the National Science Foundation (NSF), XSEDE is a virtual system that scientists can use to interactively share computing resources, data, and expertise. XSEDE is the most powerful and robust collection of integrated advanced digital resources and services in the world. TACC is one of the leading partners in the XSEDE project, whose resources include more than one petaflop of computing capability and more than 30 petabytes of online and archival data storage. As part of the project, TACC provides access to Ranger, Lonestar, Longhorn, Spur, and Ranch through XSEDE quarterly allocations. TACC staff members support XSEDE researchers nationwide, and perform research and development to make XSEDE more effective and impactful. The XSEDE partnership also includes: University of Illinois at Urbana-Champaign, Carnegie Mellon University/University of Pittsburgh, University of Texas at Austin, University of Tennessee Knoxville, University of Virginia, Shodor Education Foundation, Southeastern Universities Research Association, University of Chicago, University of California San Diego, Indiana University, Jülich Supercomputing Centre, Purdue University, Cornell University, Ohio State University, University of