There are images of some of the tracking dots, along with more background information here: https://www.eff.org/wp/investigating-machine-identification-code-tec

There are images of some of the tracking dots, along with more background information here: https://www.eff.org/wp/investigating-machine-identification-code-technology-color-laser-printers https://www.eff.org/wp/investigating-machine-identification-...