NIST has been designated by the Federal Chief Information Officer (CIO) to accelerate the federal government's secure adoption of cloud computing by leading efforts to develop standards and guidelines in close consultation and collaboration with standards bodies, the private sector, and other stakeholders. Standards are critical to ensure cost-effective and easy migration, to ensure that mission-critical requirements can be met, and to reduce the risk that sizable investments may become prematurely technologically obsolete. Standards are key elements required to ensure a level playing field in the global marketplace. The NIST Cloud Computing Standards Roadmap Working Group has surveyed the existing standards landscape for interoperability, performance, portability, security, and accessibility standards/models/studies/use cases/conformity assessment programs, etc., relevant to cloud computing. Using this available information, current standards, standards gaps, and standardization priorities are identified within this document.