This is an invite only meeting for the National Science Foundation (NSF) Broadening Participation in Computing (BPC) Alliance Accelerator. The NSF BPC alliances serve as national resources for broadening participation in computing research and education. The BPC-A Accelerator brings together BPC Alliances to advance our mutual goal of BPC by sharing knowledge and maximizing use of the tools, knowledge, and resources available across the Alliances to develop sustainable solutions to address the lack of diversity in computing.