A round robin is a form of fan fiction where many authors take turns writing chapters in a story. Round robins come in two forms: moderated, where the sequence of authors is decided in advance, and unmoderated (or freeform), where they are not.
In its original meaning, the term "round robin" described correspondence to a single address authored or signed by numerous individuals. This use of the term dates from the seventeenth-century French term ruban rond ("round ribbon"), which referred to the practice of people who signed petitions against authority—usually Government officials petitioning the Crown—appending their names to a document in a non-hierarchical circle or ribbon pattern in order to disguise the order in which they had signed so that no one could be identified as a ring leader.
- Adapted from the Wikipedia article on round robins.