They're often underlined

Usage examples of hyperlinks.

There is no doubting that finally e-books will surpass print books as a medium and offer numerous options: hyperlinks within the e-book and without it - to web content, reference works, etc.

Web Critics, who work today mainly for the printed press, publish their wares on the net and collaborate with intelligent software which hyperlinks to web sites, recommends them and refers users to them.

The private paper will contain hyperlinks to other sites in the Internet: to reference material, to additional information on the same subject.

It will contain hyperlinks to sites, to additional information on the Net and to alternative sources of information.

With her browser she had located and assembled an extensive directory of Web sites relating to human genetic diseases, most of them with hyperlinks to associated resources, many providing message boards and E-mail addresses through which the families of the afflicted could network to share information and advice based on their personal experiences.