While today's educators tend to think of educational or instructional technology as equipment—particularly electronic equipment—Saettler (1990) reminds us that such a limited definition would have to change over time as resources change. Only about 20 years ago, Cuban's history of technology in education since 1920 (1986) placed the emphasis on radio and television, with computers as an afterthought. If such a description were written now, the focus might be on the Internet, while 20 years from now, it might be on intelligent computer-assisted instruction or virtual reality or whatever these technologies are called then. As the 1970 commission concluded, a broader definition of educational technology that encompasses both tools and processes "belongs to the future" (Saettler, 1990, p. 6).
Therefore, in the view of most writers, researchers, and practitioners in the field, useful definitions of educational technology must focus both on the process of