This document summarizes and analyzes instructional technology. It discusses how the field has had different names over time, such as audiovisual instruction and education technology. While instructional technology is the most widely used term in the US, the field is difficult to define because it is constantly evolving. Early definitions of instructional technology focused on instructional media and physical means of presentation, while later definitions emphasized the process of design and development. The most recent definition characterizes it as the study and practice of facilitating learning through appropriate technological processes and resources.