And also EFF's attempt to track all printers that do or do not display tracking dots which they eventually prepended with

> (Added 2015) Some of the documents that we previously received through FOIA suggested that all major manufacturers of color laser printers entered a secret agreement with governments to ensure that the output of those printers is forensically traceable.

> This list is no longer being updated.

https://www.eff.org/pages/list-printers-which-do-or-do-not-d...