I just wanted to bring you up to date on what I've been to CDS (aka tkWWW). You can select the link under What is tkWWW? to get an overview of what this thing is. Also you can choose the ODE and random process sections to get rough ideas of what a random process or ODE app may look like. Be patient. It takes a few seconds for the pages to load. Also if the browser looks like it is stuck, Hit refresh. Also when you are done, do a "ps -ux" to check for any stray processes. There's a lot more on the main menu, but I'll let you play with it. %% button $this.backtrack -text "Press here to go back" -command {tkWWWBacktrack} $this append $this.backtrack %%