June 30, 1998 In the month of June, the Muon group focused on June milestone items required by the Algorithms group. We provided Serban with MuReco code with processed "Hit" classes for all detectors (PDTs, MDTs, WMSCs and FMSCs). The code read in chunks of simulated data from D0GSTAR, processed them using Muon System Geometry and standard RCP package and wrote out Hit chunks as per D0 EDM. The official muon geometry code however hasn't been completed and was not used in the RECO. We are pleased to report however, that we have made a lot of progress in coding official geometry and have test-released some parts of it. We are testing and debugging code for PDTs and MDTs and expect to complete them in the next couple of days. We will be working hard to complete the Scintillator Geometry expeditiously. In the month of June, we have also spent a considerable amount of time on an indexing scheme that uniquely describes the active components of the Muon system at all levels of granularity. This MuoIndex scheme, (its classes and utilities) we think, will make coding of Geometry, data unpacking and RECO more elegant and efficient. Lastly, even though, the June milestone requirement was only to produce Hit classes, the MuReco code does also segment-finding and writes out segment chunks. During the month of June, we had three meetings with Muon software review panel. The issues and software reviewed had to do with Geometry classes, MuoIndex and MuReco Hit classes. The focus for next month would be: (1)to make improvements in the MuReco code based on suggestions of the review panel and discussions within the Muon group and (2)to make progress on global tracking with TRF++.