On July 29, 2015, President Obama issued an Executive Order establishing the National Strategic Computing Initiative (NSCI) to ensure the United States continues leading in this field over the coming decades. The White House National Strategic Computing Initiative Workshop was held at the request of the NSCI Executive Council, on October 20 and 21, 2015. The goal of the workshop was to capture the full breadth of the participants’ individual opinions and ideas on four NSCI themes: - Convergence of data analytics and computationally-intensive computing - Future computing technology (beyond Moore’s Law) - Improving productivity in HPC application development and deployment - Workforce development The two-day workshop brought together approximately 250 participants representing industry, government, academia, and other organizations. The workshop was the first public forum where stakeholders from different sectors could share opinions on the challenges and opportunities of increasing computing demands, the increasing role of big data, and the evolving technological landscape in high performance computing (HPC)