This publication represents the NASA research and technology program for FY 1991. It is a compilation of the Summary portions of each of the RTOP's (Research and Technology Objectives and Plans) used for management review and control of research currently in progress throughout NASA. The RTOP Summary is designed to facilitate communication and coordination among concerned technical personnel in government, industry, and in universities. The first section contains citations and abstracts of the RTOP's and is followed by four indexes: Subject, Technical Monitor, Responsible NASA Organization, and RTOP Number.


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