The operating system used in a hospital is most likely to be multi-user.
Hospitals often need to support multiple users accessing various systems simultaneously, such as electronic health records (EHR), patient management systems, and other critical applications. A multi-user operating system allows for this simultaneous access and ensures that multiple healthcare professionals can collaborate and retrieve patient information as needed.
While real-time operating systems may also be used for specific applications (like monitoring vital signs), the overall system used in a hospital environment is primarily multi-user.