This document discusses concepts related to hypertext and intertextuality. It defines hypertext as text on electronic devices that contains links to other text that can be immediately accessed by clicking. Hyperlinks are highlighted text or images that link to other websites or pages. The World Wide Web is the most well-known implementation of hypertext, where any clickable text on a webpage is considered hypertext. The document also defines intertextuality as when a text references or alludes to another text, and provides examples of different types of intertextual references such as appropriation, allusion, and parody.