https://www.youtube.com/watch?v=pboejsWb484 https://www.youtube.com/watch?v=pboejsWb484 These got installed, but adoption was low due to cost, they were tied i

https://www.youtube.com/watch?v=pboejsWb484 https://www.youtube.com/watch?v=pboejsWb484 These got installed, but adoption was low due to cost, they were tied into the POS.