TIL that manufacturers built printers to add microdots to the paper they print so any sheet of paper can be backtracked to the printer's owner

https://en.wikipedia.org/wiki/Printer_tracking_dots
#til #todayilearned
https://www.reddit.com/r/todayilearned/comments/1gt1gax/til_that_manufacturers_built_printers_to_add/