Health information management fits the bill, and it has the track record to prove it. Consequently, a sharp increase in hospital computer systems in which this information is stored and accessed has emerged. CHAPTER ONE 1.0 INTRODUCTION Medicine like many other professions today is faced with major problem of information management and resource sharing, in that reason the essence of writing on this particular topic cannot be over emphasized. DOS offers the ideal type of analytics platform for healthcare because of its flexibility. Hospital management system (HMS) or Hospital management information system (HMIS) is an element of medical informatics solution s that focuses mainly on the administration needs of hospitals. The hospital was founded by Dr.S.Rajendran who is a leading Laser and Laparoscopic surgeon. Healthcare is the most critical aspect of our society, and many health care providers face challenges to offer practical and active services to patients. The Health Catalyst Data Operating System (DOS™) is a breakthrough engineering approach that combines the features of data warehousing, clinical data repositories, and health information exchanges in a single, common-sense technology platform. Its head office is located at Royapettai, Chennai. Health information management is the process of acquiring, analyzing, and protecting medical information (commonly called medical records) on patients each time they are seen by a healthcare provider. Our present modern information system makes use of computers for the execution, each of them connected through an optimized network. Thanks to technology, a wealth of information is available and accessible from a medical cart with a computer. The History of Health Information Management. The development of information systems and electronic records within health needs to consider the information needs and behaviour of all users. Hospital Management System 1. A U.S. federal mandate stipulated that every healthcare facility with Medicare funding must store patient information electronically. Health informatics and information science need to take account of the unique aspects of health and medicine. This has been intellectually managed with the addition of hospital management system. Biomedical and Health Information Sciences University of Illinois at Chicago December 8, 2014. Patient-facing health IT should be simply designed to encourage and sustain use and engage patients at various levels of health literacy. Increasing numbers of organizations are implementing health information and communication technology (HIT) or are transitioning to more robust information systems that include computer-based order entry and clinical decision support. An HMS is a computer or web-based application that manages the functioning of an entire hospital.This customizable integrated syste m is designed to manage all the operations of the hospital… 3 Patients increasingly express interest in being involved in medical decision-making and desire access to their health information. Three important and related concepts are often used interchangeably in discussing protection of health information within the U.S. healthcare system: confidentiality, privacy and security. It has been found that geographical limitation in the biggest issue in health care system. In the early 1900s, very little patient information was recorded. The United States has a long history of health information management (HIM). The hospital is located at Dhanappa Mudali Street which is very near to Madurai Meenakshi Amman Temple. 2) Many limitations have been minimized with the effective use of the technology. Its motive is to "Reach the Unreached".