POS收银机销售系统功能包括：收银，挂单，取单，退货，对商品，账户的维护，查询销售记录等。 -POS cash register sales system features include: cash register, lodging take orders, returns, commodities, account maintenance, check sales records.

POS收银，Linux下的超市POS机收银系统-POS cash register, Linux POS machine under the supermarket cash register system