Besides offering a great number of different information bases, ranging from full-text journal libraries to reports of missing children, online services allow users to, for example, reserve airline tickets, buy stocks, purchase goods, and communicate with other users. In exchange for the service, users usually pay a monthly membership fee. They may also pay to connect to various databases on the service or to download information.


在提供许多不同信息的基础之上，从杂志图书馆到丢失孩子的报告，网络在线服务允许使用者去做，比如，订飞机票，买股票，购物，和其他使用者交流。作为对这个服务的交换，使用者通常会每月支付会员费用。他们也可能花钱去连接各种各样的数据库或者去下载信息。