Advanced computing has become increasingly important to research in accelerator science and technology. LBNL's Accelerator Modeling and Advanced Computing (AMAC) Program brings together the Lab's accelerator researchers to develop new models, algorithms and software to solve the most challenging and important problems in accelerator design and analysis. Examples include enhancing existing facilities; designing future accelerators; developing accelerators to solve problems of national importance such as a Heavy Ion Fusion driver for energy independence; and exploring advanced accelerator concepts based on lasers and plasmas. Terascale computers are already being used to solve these challenging problems. Ultrascale computers will be essential to address future challenges as researchers design and develop accelerators in new regimes of beam intensity, beam energy, and system complexity. Berkeley Lab is a natural site for this effort. Some 80 years after its founder and namesake invented the cyclotron, the laboratory remains a leader in particle-accelerator R&D. It is also home to a pair of invaluable central resources for modeling and simulation: a strong and highly collaborative computational research division, and the National Energy Research Supercomputing Center. We encourage you to explore this site and learn more about what state-of-the-art computing hardware, software, and algorithms can do for accelerators and beams.