• When you insert the Solver or Risk Solver add-on into Google Sheets, only a "pointer" to a Web server (operated by Frontline Systems, also on Windows Azure) is stored.
• When you use Google Sheets, the contents of your Google workbook, rendered as HTML, CSS and JavaScript, is securely transferred over the Internet to your browser (using SSL).
• When you activate the Solver add-on or Risk Solver add-on, its code is downloaded from Frontline's Web server into your browser, where it runs and displays its task pane.  As you define your model, cell selections and options are stored in properties, which will be saved when your Google workbook is next saved to online storage.
• When you click the Solve or Simulate button, your workbook is saved in .xlsx format and sent to the RASON server to be solved.
• Your workbook is held temporarily in a disk-based queue by the RASON Server; when it is processed and the solution is found, all disk and memory-based copies of the workbook are deleted, and the results are returned to the Solver or Risk Solver add-on in your browser.  If you save the results, they will be saved when the workbook is next saved to online storage.

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