and its various operational components and support offices, have used terminology to refer to people in certain racial, ethnic, national, and religious groups. Many of these terms were acceptable during an earlier era but have since been viewed by many in government, the public, and the communities with which DHS interacts as disrespectful, noninclusive, and not reflective of important equity considerations. The DHS Office for Civil Rights and Civil Liberties (CRCL) requested the Homeland Security Operational Analysis Center's (HSOAC's) assistance to examine the department's use of such terminology in its documents and procedures, identify ways to improve it, and to create an organizational culture that supports the lasting implementation of updated terminology.Specifically, CRCL seeks research and analysis to inform its participation in these and future efforts. CRCL will apply the results of this research and analysis to develop potential recommendations for the Secretary and DHS component and office leaders in accordance with its statutory mission to provide policy advice to DHS leadership on civil rights and civil liberties issues. The objective of this report is to provide CRCL with a comprehensive analytic document containing guidance to enable DHS to update terminology that aligns with the proposed 2021 U.S. Citizenship Act, and to identify ways for DHS to foster an organizational culture that supports the ongoing use of the updated terminology in three principal categories: immigration, law enforcement/public-order policing, and terrorism/counterterrorism. The report will inform DHS efforts to develop a departmental lexicon consistent with current Executive Orders, the objectives of the U.S. Citizenship Act, and recently issued departmental policies regarding the use of certain terminology.