In the past two decades, computer assisted reading instruction has developed substantially. From educators using large mainframe computers located at a distance from keyboard terminals in classrooms, today reading educators are capable of using computer-assisted instruction (CAI) on typewriter-sized equipment portable to any location and usable anywhere. Although some investigations have shown computer-assisted instruction to be more effective than teacher-directed instruction, many more investigations are needed before that question can be answered definitively. Nevertheless, research studies have had several important instructional implications: (1) CAI currently has the capability of performing instructional tasks of a drill and practice type; (2) CAI's effect on reading achievement is equal to but no greater than that of teacher directed instruction; (3) students generally demonstrate positive attitudes toward computers, although poorly constructed CAI lessons bore students just as poorly constructed teacher prepared and delivered lessons do; and (4) relatively few teachers were involved in the early experimental research studies as reading experimentation was left to professional computer experts. (HOD)