printer serial in a sentence

1. The dots are barely visible and contain encoded printer serial numbers, as well as date and time stamps.
2. After a quick look at OpenCBM documentation, the term " bus " seems to refer to the IEC bus, the original Commodore disk and printer serial bus communication protocol.
3. Most printers'codes have not been decoded, although the coding system framework and printer serial number encoding is the same on both DocuColor and the Epson Aculaser C1100 / C1100N / A.
4. It's difficult to find printer serial in a sentence.