The serial interface document is incomplete since there is at least one incomplete sentence in that document. I got it from Charles Pond, and I sent it on to other people on the list. I wouldn't really call it a manual since I don't think it was officially released as one. From the documentation section, you go to the optacon link; here is the list of what's up there as it appears in Jaws: User Manuals: list of 3 items . Optacon Owner's Manual Model R1D.TXT . Optacon II User Manual Model R2A.TXT . Optacon User Manual Addendum R2B.TXT list end Training Materials: list of 5 items . Optacon Teaching Guidelines.PDF . Optacon Training Stage 1 - Grapheme Recognition.PDF . Optacon Training Stage 2 - Text for Speed Building.PDF . Optacon Scanner Pacing Lessons .PDF . Optacon Independent Practice Manual.PDF list end It doesn't look like the CRT Lens three-page document got up there. Mary To unsubscribe at any time, just send a message to: optacon-l-request@xxxxxxxxxxxxx with the word "unsubscribe" (without the quotes) in the message subject. Tell your friends about the list. They can subscribe by sending a message to: optacon-l-request@xxxxxxxxxxxxx with the word "subscribe" (without the quotes) in the message subject.