Yes. Web browsers cache information and create a history file on the local workstation. This allows a subsequent user of the workstation to access the system under your name using the browser's Back button to recall a page from the cache, or by finding a page with your personal information in the browser's history file.
If you login to Portal1791 on a public workstation, please remember to sign out when you are finished by clicking “Logout” in the top left-hand corner of the menu. Delete from the file history those pages that contain your personal information. Then exit from the web browser to prevent the Back button from accessing the pages you were using.