4. In the American economy, the concept of private property embraces not only the ownership of productive resources but also certain rights, including the right to determine the price of a product or to make a free contract with another private individual.

　　[参考译文]在美国经济中，私有财产的概念不仅包含对生产资源的所有权，也指其他一些特定的权利，如确定一个产品价格和与另一个私人个体(经济单位)自由签定合同的权利。

　　5. At the same time these computers record which hours are busiest and which employers are the most efficient, allowing personnel and staffing assignments to be made accordingly. And they also identify preferred customers for promotional campaigns.

　　[参考译文]同时这些计算机记录下哪些时间是最忙的，哪些员工工作效率最高，这样就能相应地做出人员人事安排。而且它们(计算机)也能为促销活动找到那些拥有优先权的顾客。

　　6. Numerous other commercial enterprises, from theaters to magazine publishers, from gas and electric utilities to milk processors, bring better and more efficient services to consumers through the use of computers.

　　[参考译文]不计其数的其他商业企业，从剧院到杂志出版商，从公用燃气电力设施到牛奶处理厂，都通过计算机的使用给消费者带来更好、更有效率的服务。