This collection brings together essays written from a rhetorical perspective that demonstrate how usability studies have impacted theory and practice in rhetoric and composition. The goal is to bring the study of usability into the broader arena of rhetoric and composition and to examine how usability is defined, how rhetorical theories and principles affect our understanding of usability, and how usability can affect our perspectives on writing and writing instruction. The collection includes essays that address connections between usability and issues such as course design, disability, universality, documentation styles, and pedagogical practice.