Thinking about this a bit more - it really seems you have it in for me. I know I keep mentioning verifiable sources, and it can be a pain. But I am simply thinking about this from the point of view of FAC. At FAC the citation you added would be questioned. So, that's not my decision. But also, it wouldn't surprise me if a FAC reviewer thought "Why is the editor mentioning that a third party serial modem port was available?" Nowhere in the sentence did you explain why this third party product was made. —  (talk ~ edits)