I use the essentially similar Handmark Mobile DB for reference. I have cheat sheets for JCL, ISPF, ksh, and Teradata commands. I also have a similar set of cheat sheets for Photoshop Elements 5.
The ability to import and export to MS Access makes DB creation and transfer very easy. Yes, I COULD do this with a Docs to Go spreadsheet, but the ability to use a form to display 1 record per screen makes this flat file database product easier to use than a spreadsheet.
