Mathematical Model UnTRIM – MPI Version Manual Jacek A. Jankowski Abstract. This document is aimed to provide the user of the MPI version of UnTRIM with necessary information for the installation, compilation and especially execution of the software. The text can be obtained from the BAW site. Reference: Jacek A. Jankowski. Mathematical Model UnTRIM – MPI Version Manual, BAW, Technical Report, Karlsruhe 2008.