People on the road often want to use their portable electronic equipment to send and receive telephone calls, faxes, and electronic mail, read remote files, login on remote machines, and so on, and do this from anywhere on land, sea, or air.

• 走在半路上的人们经常想要用他们随身携带的电子装备发送或者接受电话、传真、和电子邮件，阅读距离自己很远的文件，登录遥远的机械设备，等等，并且想在陆地上、海上和空中的任何地方都可以做到这些。