Charm Hadronic Decays

In this paper, we report recent results on charm hadronic decays using data taken at E831/FOCUS experiment which is a photo-production experiment at Fermilab. During its 1996-1997 run, we obtained more than 1 million high quality charm particles. Using this sample we study Dalitz plot analysis of D+ and DS+→π+π−π+ using K-matrix formalism, high multiplicity charm mesons decays of many bodies and the measurements of excited charm resonant states.