Retrospective searches provided by a NASA Regional Dissemination Center (RDC) were found to be of substantial value to researchers during a six-month experimental period at the University of Denver's Research Institute (DRI). The purpose of the experiment was to gain a better understanding of the usefulness of an RDC to a user organization. DRI subscribed to the services of the University of New Mexico's Technology Application Center (TAC), a computer-based NASA RDC established to facilitate the transfer of technology. The entire process was monitored and evaluated by staff members in the Industrial Economics Division of DRI. Within DRI, professional staff members in six divisions received 15 retrospective searches. Some major conclusions were: (1) the NASA data base is not adequate for most of DRI needs and the augmentation offered by TAC is valuable, (2) TAC services are not a total answer for researchers, (3) a TAC search is most likely to be viewed as valuable to a researcher in a new but related field, (4) the experience of dealing with a computerized system and the necessary search strategy was a learning experience, (5) lack of access to classified information is not a serious problem, and (6) there was little demand and satisfaction with the current awareness service. It was recommended that DRI subscribe to TAC. (Author/JB)