The document outlines the various modules that make up a Hospital Information System (HIS). It describes 9 core modules: Patient Management System, Billing and Accounts, Medical Records, Clinical Information, Laboratory Information, Blood Bank, Pharmacy, Radiology, and Forensic/Mortuary systems. Each module manages a different clinical or administrative function like registration, billing, lab tests, prescribing, and autopsy records. The HIS integrates these modules to digitally manage patient data and workflows across all hospital departments.