This article contextualizes the special issue of the journal by discussing the importance of language variables in the study of communication technology. It asserts three reasons to study technology: to see how technology changes language use, to see how social actors adapt to technology limitations and thereby bring into sharp focus basic social processes in human interaction, and to inform the design of technologies based on theories of language and the requirements of communication dynamics. Computer-mediated communication offers special opportunities for examining language and communication theory, in that online discourse is immune to many nonverbal communication elements that may confound language effects in speech. The role of language in communication technology research has been cyclical, with recent research refocusing on language data as evidence of human-computer interaction effects. Future research directions are suggested.