The document discusses a study conducted on the implementation of a Hospital Information System (HIS) at the National Heart Institute in India. The study aimed to analyze changes in outpatient department workflows, perform data mapping between existing and new electronic systems, and enrich the electronic masters. Key findings included improved patient registration times and billing processes as well as faster information flow across departments after HIS implementation. The document also describes various components of developing and implementing the computerized HIS including system analysis, design, testing and evaluation.