The document summarizes several "minor" shared hospital information systems that operated in the United States during the 1970s, in addition to the major players SMS and McAuto. It describes systems run by GE, Medical Data Systems (MDS), Tymshare, the Information Services Division (ISD) of American Hospital Supply, and two systems in New York and New Jersey started by John DePierro. These shared systems automated clinical and administrative functions for numerous hospitals through time-sharing on mainframe computers. However, they declined as personal computers emerged in the 1970s, providing a cheaper alternative to mainframes.