Computers and writing is a sub-field of college English studies about how computers and digital technologies affect literacy and the writing process. The range of inquiry in this field is broad including discussions on ethics when using computers in writing programs, how discourse can be produced through technologies, software development, and computer-aided literacy instruction. Some topics include hypertext theory, visual rhetoric, multimedia authoring, distance learning, digital rhetoric, usability studies, the patterns of online communities, how various media change reading and writing practices, textual conventions, and genres. Other topics examine social or critical issues in computer technology and literacy, such as the issues of the "digital divide", equitable access to computer-wr