Includes publications, proposals, plans and contract drawings of the radio astronomy telescope, including t-shirts and memorabilia publicizing the observatory. Also, a large artist's rendering of the telescope.

Materials about the Arecibo Ionspheric Observatory and the National Astronomy and Ionospher Center include publicity materials, articles, and reprints; report and manual on Computer Aided Noise Measurement Instrumentation; manual on Dual Channel 2270 MHz Cooled GaAsFET Frontend; and other publications and research notes on Arecibo.

Files, primarily from his tenure as Vice Provost, include materials on the Arecibo Ionospheric Observatory/National Astronomy and Ionosphere Center. Also includes files on the decommissioning of the nuclear reactor at the Ward Center for Nuclear Sciences.

Papers documenting Terzian's research and teaching at Cornell University as well as his work with various professional societies and astronomical related organizations. Research topics focus on radio and radar astronomy, but also include items relating to teaching of science. The collection includes papers relating to Terzian's work on projects such as the Square Kilometer Array giant radio telescope and at Arecibo Observatory.