This document discusses the use of computers as tutors in education. It notes that originally computers were designed in the 1950s to perform mathematical and logical operations, and the invention of microcomputers and PCs allowed them to be used for programmed instruction. Educators saw potential for individualized learning using computers given typical large class sizes. This led to the development of computer-assisted instruction (CAI), where a computer program delivers instruction, helping relieve teachers from individual tutoring but not replacing them. The document outlines the roles of teachers, students, and computers in CAI - with teachers planning objectives and evaluating outcomes, students receiving and applying knowledge, and computers acting as tutors that deliver instruction, reinforce learning, and provide feedback.