Recommendations from the AIA/SEI Workshop on Research Advances Required for Real-Time Software Systems in the 1990s SweetWilliam GagliardiMichael J. KleinMark H. LittleReed Van ScoyRoger VeltreRobert WeinstockCharles B. 1989 The Aerospace Industries Association (AIA) and the Software Engineering Institute sponsored a workshop to facilitate clear communication between the implementors of future software-critical large systems and the professionals who sponsor or perform software-related research. The workshop was held at the SEI in Pittsburgh, Pennsylvania, on September 13-14, 1989. At the workshop, a representative group of designers of major upcoming software systems discussed among themselves and with representatives of the research community the areas of software system technology that require research advances to successfully implement these systems. The results of the discussions are summarized in this report.