Book excerpt: ​The Encyclopedia of Terminology for Educational Communications and Technology is a volume of scholarly definitions and short discussions of approximately 180 key terms of the field. Each 200-500 word entry includes material such as the salient attributes of the term, any alternative views and interpretations of the term, and future trends. The definition discussions are supported with relevant literature from educational communications and technology and related fields, such as communications or educational psychology. Individual signed entries are written by over 50 established scholars from throughout the field and throughout the world. The terms included in the encyclopedia cover the many topics addressed by the field’s practitioners and scholars. They encompass six general categories of educational technology content – foundational subjects, instructional design, technology and media, analysis and evaluation, management and organizational improvement, and research and theory.​