File consists of material relating to the writing and publication of an application case history about the the use of Electrohome's ECP 4000 projectors at Martin Marietta space launch systems interactive demonstration centre (Denver, CO). Includes correspondence and memoranda (some faxed), edited draft and final typed versions of story outlines and of articles (some faxed), ms. notes, a photograph of the projection system at the demonstration centre, and other information about Martin Marietta.