This document discusses computer assisted instruction (CAI) in education. It defines CAI as an interactive instructional technique using computers to present material and monitor learning. CAI allows individualized self-paced instruction. It describes different types of CAI including drill and practice, tutorials, games, and simulations. The document also outlines the characteristics, features, uses, role of teachers, merits, and limitations of CAI. It concludes that while CAI has benefits for students, teachers are still needed to support learning and address limitations.