@techreport{R-88-17, TITLE = {Multi-Level Software Architectures - Industrial Experiences and Research Directions}, AUTHOR = {Bengt Lennartsson}, YEAR = {1988}, NUMBER = {R-88-17}, INSTITUTION = ida, ADDRESS = idaaddr, ABSTRACT = {}, IDANR = {LiTH-IDA-R-88-17}, NOTE = {This report is a revised version of a paper in Advance Working Papers of The Second International Workshop on Computer-Aided Software Engineering. Cambridge, Massachusetts. July 12-15, 1988}