Hypertext poetry is a type of digital poetry that use linkages created with hypertext mark-up. It is a highly visual form connected to hypertext literature and the visual arts. Because of the connections, a hypertext poetry has no defined sequence, with the poem moving or being formed in reaction to the links selected by the reader/user. A hypertext poetry also may include audio, video, or other forms of media integrated into the text. Hypertext poems use different types of links: internal links within the same document, external links to other documents, quotes, references, images, etc. By selecting one link over another, the user can cause the computer to display information from another location. This ability to connect information from various places allows the poet to show the relationship between different topics involved in a complex subject. An example of a hypertext poetry system is the web based system called "Tapestry". This system was first developed in the United States by the National Endowment for the Arts. They began funding artists' projects involving digital technology in 1984 and continue to do so today. The Tapestry project was started by James Tenney who wanted to create an online poetry museum that would allow visitors to explore hundreds of artists' works on many subjects from ancient times to the present day. The system uses graphics, audio, and video elements combined with interactive features such as voting and suggestion boxes that let users contribute to the website.