Langley's mission is accomplished by performing innovative research relevant to national needs and Agency goals, transferring technology to users in a timely manner, and providing development support to other United States Government Agencies, industry, other NASA Centers, the educational community, and the local community. This report contains highlights of some of the major accomplishments and applications that have been made by Langley researchers and by our university and industry colleagues during the past year. The highlights illustrate the broad range of research and technology activities carried out by NASA Langley Research Center and the contributions of this work toward maintaining United States' leadership in aeronautics and space research. A color electronic version of this report is available at URL http: //larcpubs.larc.nasa.gov/randt/1998/.Langley Research CenterRESEARCH AND DEVELOPMENT; NASA PROGRAMS; AEROSPACE TECHNOLOGY TRANSFER; CIVIL AVIATION; EARTH SCIENCES; AERONAUTICS; SPACE EXPLORATION; SPACE TRANSPORTATION; AEROSPACE SCIENCE