The Origin of Electronic Health Records: The Legacy of MIS-I

Developed in the 1960s by Lockheed Martin (then Lockheed Missiles and Space Co.) in partnership with El Camino Hospital in Mountain View, California, MIS-I laid the groundwork for modern electronic health records (EHRs). The system, which allowed doctors and nurses to access patient data, issue orders, and manage care through a 14-inch television monitor and light pen, marked a pivotal shift from paper-based records to digital health information. Subheading
The Birth of MIS-I
MIS-I’s development began in 1964 as Lockheed sought to diversify beyond aerospace. The company partnered with El Camino Hospital to create a system that could streamline clinical workflows. At the time, medical records were stored in heavy manila folders in hospital archives, requiring staff to manually retrieve and update files. This process was time-consuming and prone to errors, according to an EHR in Practice article. MIS-I aimed to address these challenges by digitizing patient data. The system’s design was innovative for its era. It used a light pen—a precursor to modern touchscreens—to input and retrieve information. Doctors and nurses accessed patient records by swiping an ID badge, then using the light pen to select categories like medical history or test results. A keyboard and printer were also included for data entry and documentation. “The insight that physicians could not and would not learn to type, combined with the innovative solution of light pen interaction, transformed an impossible dream into practical reality,” the IEEE Milestone proposers wrote. Subheading
Challenges and Legacy
Despite its promise, MIS-I faced resistance. Many physicians struggled to adapt to the technology, with some complaining they spent more time “fighting a machine” than caring for patients. Nurses argued that MIS-I improved care coordination and reduced clerical burdens. Over time, the system gained traction. By 1971, it was used across departments, including admissions, pharmacy, and radiology. The system’s impact extended beyond El Camino Hospital. By 1993, MIS-I was installed in over 200 hospitals across the U.S., Canada, and Europe. It influenced later EHR platforms like Epic and Oracle Health, which remain widely used today. “This pioneering work helped establish the foundation for the modern medical informatics industry,” said Dan Woods, CEO of El Camino Health, at the IEEE ceremony. Subheading
Honoring a Milestone
The IEEE Milestone recognition highlights MIS-I’s role in advancing healthcare technology. The bronze plaque installed at El Camino Hospital notes that the system “reduced costs and errors, improved safety and outcomes, and led the way to modern medical and clinical informatics.” The ceremony featured remarks from IEEE President-Elect Jill Gostin and a Q&A with Melville Hodge, one of MIS-I’s lead developers. Hodge recounted a 1970s hospital board meeting where physicians complained about the system, only for an emergency announcement to reveal it had failed. “I had to ignore it to survive,” he joked, recalling how nurses’ persistence eventually won over skeptics. Subheading
Why It Matters Today
MIS-I’s legacy is evident in today’s EHR systems, which manage everything from vaccination records to surgical procedures. However, challenges remain. The lessons from MIS-I—such as the importance of user-friendly design and clinician collaboration—continue to shape modern healthcare technology. As hospitals worldwide transition to AI-driven diagnostics and cloud-based records, the principles pioneered by MIS-I remain relevant. “The medical information system was more than a technological breakthrough; it was proof of what can happen when clinicians, engineers, and community leaders unite around a common goal,” Woods said. The IEEE Milestone ensures that this early innovation is remembered as a cornerstone of digital healthcare. Quoted text
“The medical information system was more than a technological breakthrough; it was proof of what can happen when clinicians, engineers, administrators, and community leaders unite around a common goal: improving care for patients.”
—Dan Woods, El Camino Health CEO

Quoted text
“The insight that physicians could not and would not learn to type, combined with the innovative solution of light pen interaction, transformed an impossible dream into practical reality.”
—IEEE Milestone proposers