In 1964, in "A Guide to Instructional Television," editor Robert M. Diamond defined "educational television" as a "broad term usually applied to cultural and community broadcasting which may include some programs for in-school use" (p. 278). His definition for instructional television was "television used within the formal classroom context on any educational level." Researchers interested in the history of instructional television can explore many topics from program type to school involvement. In "Educational Telecommunications" (1977), Donald N. Wood and Donald G. Wylie devoted a chapter to examining eight levels of school television involvement: "single-classroom applications, school-level projects, district administration, metropolitan ITV associations, statewide operations, regional activities, national programs, and international developments" (1977, p. 193). This article summarizes many collections and oral history interviews in the National Public Broadcasting Archives (NPBA) which pertain to all the above levels except single-classroom applications and international developments.