CHAPTER 1 INTRODUCTION Volume 3 of this manual is designed to provide explanations of the functioning of the individual routines making up the package. Beginning with Chapter 3, descriptions are given of several general purpose routines useful in data analysis, the MIIPS plotting routines, and the routines dealing with the SAD disk data format. Subroutines which perform the various options available in MIIPS are not described here; however, expanations and examples of their action are given in Volumes 2 and 3, respectively of this manual. The higher level modules are in general not system dependent but the lower level routines which read from and write to devices, are specific to the VAX VMS operating system. MIIPS has not been ported to any other platforms since, in general, the available alternative operating systems do not have features, such as extensible files, needed by MIIPS which are built into VMS.