This guide is the fourth in a series entitled Introduction to the Scientific Computing Division. Included in this guide are descriptions of the requirements for remote access and RJE policies. Services available to the remote user are listed. The terminal command language is described in Chapter 2, which lists each command with examples, rules and specifications, acknowledgments and diagnostic messages. The sample site sessions in Chapter 3 cover the sequence of events necessary to perform typical RJE functions. Chapter 4 is of general interest to site users. Various topics covered here are: Site Already Active message, END Command, and Time Out; Resetting of Printer or Screen Line Length; Interrupting or Stopping Printer Output; Dropping a Job From a BACKGROUND Queue; Using Tapes From an RJE Site; and Operator Console Messages. The final chapter contains technical information designed to aid the user in locating and eliminating many RJE problems, and includes sections on Protocol Standards, Special Characters and the NCAR 7600 Character Set, Deletion of Characters and Lines, Delimiting the End of a Card or Line, Half-Duplex Turnaround Delay, and Test Decks. This edition of Using the Remote Job Entry System is concerned only with remote job entry through the MODCOMP. Future editions will include remote job entry through the 4341 I/O satellite.