The Sixth Edition of the Software Architecture: Theory, Technology, and Applications (SA-TTA 2019) is part of the 34rd ACM/SIGAPP Symposium on Applied Computing (SAC).  For the past years, ACM SAC has been a primary gathering forum for applied computer scientists, computer engineers, software engineers, and application developers from around the world. SAC 2019 is sponsored by the ACM Special Interest Group on Applied Computing (SIGAPP). It will be held in Limassol (Cyprus), hosted by the University of Cyprus.