The HPC User Forum community includes thousands of people from the steering committee, member organizations, sponsors and everyone who has attended a meeting. Our mission is to promote the health of the global HPC industry and address issues of common concern to users. Unlike most other HPC events, the HPC User Forum focuses primarily on important issues — characterizing them, openly discussing them, and acting where possible to address them. Participation in forum meetings is open to anyone with an interest in high performance computing or high performance data analysis (big data using HPC), including users, vendors, funders, and others. Since 1999, more than 50 meetings have been held in North America, Europe and Asia. Thousands of individuals representing hundreds of organizations have attended meetings as speakers or active audience members. We welcome your participation and your suggestions for issues the forum should address.