Computerised Patient Management System is a category of software that deals with the day-to-day operations of a medical practice. Such software frequently allows users to capture patient demographics, schedule appointments, maintain lists of insurance payers, perform billing tasks, and generate reports. It is commonly refered to as Practice Management Software. In the United States, most PMS is designed for small to medium-sized medical offices. Some of the software is designed for or used by third-party medical billing companies. PMS is often divided amongst desktop-only software, client-server software, or Internet-based software.The desktop variety is intended to be used only on one computer by one or a handful of users sharing access. Client-server software typically necessitates that the practice acquire or lease server equipment and operate the server software on that hardware, while individual users' workstations contain client software that accesses the server. Client-server software's advantage is in allowing multiple users to share the data and the workload; a major disadvantage is the cost of running the server. Internet-based software is a relatively newer breed of PMS. Such software decreases the need for the practice to run their own server and worry about security and reliability. However, such software removes patient data from the practice's premises, which can be seen as a security risk of its own.PMS is often connected to electronic medical records (EMR) systems.