RJE workstations use systems network architecture (SNA) to gain access to JES2 through VTAM®. During VTAM system definition, these RJE workstations (for example, 3790 terminals, 3770 terminals, and System/32 workstations) are defined to VTAM as logical units (LUs) and physical units (PUs) by means of the VTAM LU and PU definition statements, respectively. At VTAM system definition, each installation must decide how to tailor the JES2/VTAM support for its SNA stations. The parameters of the LU and PU statements affect not only how JES2 operates, but also how the remote operator uses the workstation.