It is quite well known these days, check the EFF [1] and Wikipedia [2] pages, there's info on the what, how, when and why [1] https://www.eff.org/pages/list-pr

It is quite well known these days, check the EFF [1] and Wikipedia [2] pages, there's info on the what, how, when and why [1] https://www.eff.org/pages/list-printers-which-do-or-do-not-display-tracking-dots https://www.eff.org/pages/list-printers-which-do-or-do-not-d... [2] https://en.m.wikipedia.org/wiki/Machine_Identification_Code https://en.m.wikipedia.org/wiki/Machine_Identification_Code