The new FJSRC linking system, implemented with the 2008 FJSRC data, includes sets of agency dyad linked files created by improved methods of algorithmic matching. There are both inter-agency linked files and intra-agency dyad linked files. The inter-agency matched pair files (or "dyads") permit the linking of records from two different source agencies for adjacent stages of federal case processing by providing a crosswalk of the agency-specific key ID variables for the two agency data files in the pair. These agency ID variables (sequential ID numbers) may be used to link records from one agency's standard analysis file (SAF) to the next. The system enables users to track individual defendant-cases through stages of the federal criminal justice system (from arrest to prosecution, adjudication, sentencing, and corrections) sequentially, one agency dyad pair at a time. Each inter-agency paired linked file relates the sequential record numbers (i.e. SEQ_NUM) included in the SAFs from one agency/stage to another. The intra-agency matched pair files (also dyads) permit the same type of linking as described above except that the linkages are within the same federal agency. The linkages are to different stages of case processing withing a particular agency. The system covers all data years from 1994-2018. These data are part of a series designed by the Urban Institute (Washington, D.C.) and the Bureau of Justice Statistics. Data and documentation were prepared by the Urban Institute through 2012. Data from 2013 and on were prepared by Abt Associates.