Data collected from an exploratory study concerned with the technical communications practices of aerospace engineers and scientists were analyzed to test the primary assumption that aerospace managers and nonmanagers have different technical communications practices. Five secondary assumptions were established for the analysis: (1) that the importance of communicating technical information effectively is equally significant to aerospace managers and nonmanagers; (2) that the use and production of technical information and technical information products are different for managers and nonmanagers; (3) that the content for an undergraduate course in technical communications should be viewed differently by both groups; (4) that the use of libraries, technical information centers, and on-line (electronic) databases differs for managers and nonmanagers; and (5) that the use and importance of computer and information technology differs for aerospace managers and nonmanagers. Results indicated that aerospace managers and nonmanagers were found to have different technical communications practices for second, fourth, and fifth of the five assumptions tested. However, the evidence was neither conclusive nor compelling that the presumption of "difference" in "practices" could be attributed to the duties performed by aerospace managers and nonmanagers. (Twenty-seven tables of data are included, and an appendix containing the survey instrument is attached.) (KEH)