The EMR can be opened by multiple users with no notice that the data is in use. For example, Microsoft Word or Excel will have a pop-up alert that the file is a "read only" file and is locked for editing. We would like a notice that another user such as a surgical assistant is editing a Treatment Summary or part of the EMR so that if the doctor then opens the EMR and makes a change or correction, his work is not lost when the first user clicks "save" or simply exits the program and saves upon exiting.