Tree MDI is a GRML web browser that browses files and web pages. It reads and saves GRML, CSV or character-delimited formats. As an MDI web browser, it supports multiple browser windows. Each browser window has its own content and navigation history. A browser window has two parts, a form and a view. The form sends web requests and the view displays results. File and web pages use GRML, CSV or character-delimited formats. Only GRML uses a form, but all formats use a view. The form has input controls for user input. They are edit boxes, drop-down boxes, buttons, etc. The input from these controls is sent when a form is submitted. The form uses a submit control to determine the destination for a submitted request.