If you are referring to the PDF flowchart of the CTRIO2, the source of that information is me. I created flowcharts for all the major functions of the CTRIO/CTRIO2. You can download the charts from the CTRIO FAQ0054. To go there, go to our website (hosteng.com), in the left pane, click on FAQs, then select the CTRIO/CTRIO2 as the product, then scroll down to CTRIO FAQ0054.