Eldon 2 is an operating system for a KDF9 computer which has been developed by the Computing Laboratory at Leeds University. The system provides conversational file maintenance, multiple remote job entry into either a background or foreground job queue (the latter offering a turn round time of a few minutes), an efficient processing of background jobs. A disc based filing system with archive and retrieval facilities for less frequently used files is accessible via a variety of external media and the system incorporates automatic accounting for all work processed. Use of this system has increased CPU utilisation from about 50% to about 85% an allows the processing of over 1,000 jobs per day.