3 ms·
Earlier discussion of this and more sophisticated printer tracking codes: https://news.ycombinator.com/item?id=14501894 https://news.ycombinator.com/item?id=14
by avhon1 8y ago
Earlier discussion of this and more sophisticated printer tracking codes:
https://news.ycombinator.com/item?id=14501894 https://news.ycombinator.com/item?id=14501894