0 a machine in a shop or other business that records sales and into which money received is put -- （商店等的）現金進出紀錄機，現金出納機，收銀機
Since a cash register may be regarded as a cognitive system, it must be studied at three different levels.
For a cash register, everybody knows the answer: the properties of addition correspond to the logical constraints of exchange.
Consider now the second question: why does a cash register add the prices of the various purchases?
At the computational level, two questions must be answered: what function does a cash register compute and why does it compute this function?
Thus, while old-fashioned car might be listed enough to account for toy old-fashioned car, no such excuse can be made for toy old-fashioned cash register.
The shopper has to deal with a girl at the cash register as she is going out of the shop with her wire tray.
Each time the transaction occurs the cash register rings.
We shall be watching like hawks to see that they do not start ringing up the promises on the cash register again.
