This book presents the refereed proceedings of the 1998 Ada-Europe International Conference on Reliable Software Technologies, Ada-Europe'98, held in Uppsala, Sweden, in June 1998. The 23 revised full papers presented together with two invited contributions were carefully selected by the program committee. The papers address all current aspects of the Ada programming language; they are organized in sections on Ada 95 and Java, Ada 95 language and tools, distributed systems, real-time systems, case studies and experiments, software quality, software development, software architectures, and high integrity systems.