The document discusses various types of dossiers used in the pharmaceutical industry for regulatory submissions, including Investigation Medicinal Product Dossiers (IMPDs). An IMPD contains information about an investigational drug and is used to support clinical trials. It provides a standardized format for non-clinical and clinical data and should accompany all applications for clinical trials. Other dossiers discussed include Common Technical Documents (CTDs) and country-specific registration dossiers submitted for marketing approval. Effective management of dossier information is important for drug development and regulatory processes.