ICWS 2014 organizing committee invites you to participate in the 21 edition of ICWS, to be held on June 24-29 2014, Alaska, USA The IEEE International Conference on Web Services (ICWS) has been a prime international forum for both researchers and industry practitioners to exchange the latest fundamental advances in the state of the art and practice of Web-based services, identify emerging research topics, and define the future of Web-based services. Web-based services are not limited to Web services. Instead, all Web-based services-oriented software lifecycle management is included. In 2014, we will strive to advance the largest international professional forum on Web-based services. The Proceedings of ICWS is SCI & EI indexed. The IEEE 2014 World Congress on Services (SERVICES 2014) is the biggest international forum that explores the science and technology of Services Computing, which was formally promoted by IEEE Computer Society since 2003. Under the umbrella of SERVICES 2014, ICWS 2014 will co-locate with the following service-oriented sister conferences: the 7th IEEE 2014 International Conference on Cloud Computing (CLOUD 2014), the 11 IEEE 2014 International Conference on Services Computing (SCC 2014), and the 3rd IEEE International Conference on Mobile Services (MS 2014). Another co-located conference is The International Conference on Big Data (BigData 2014). The five co-located theme topic conferences will all center around "services," while each focusing on exploring different themes (web-based services, cloud-based services, services innovation lifecycle, mobile services, and Big Data-oriented services). From technology foundation perspective, Services Computing has become the default discipline in the modern services industry. As a major implementation technology for modernizing services industry, Web services are Internet-based programmable application components published using standard interface description languages and universally available via uniform communication protocols. In its 21th version, the program of ICWS 2014 will continue to feature research papers with a wide range of topics, focusing on various aspects of Web-based services. Some of the topics include Web services specifications and enhancements, Web services discovery and integration, Web services QoS (e.g., security, performance, reliability, fault tolerance, etc.), Web services standards and formalizations, Web services modeling, Web services engineering, Web services testing, Web services-based applications and solutions, Web services realizations, semantics in Web services, Web services supporting Cloud Computing, Web services lifecycle management, and all aspects of Service-Oriented Architecture (SOA) infrastructure and middleware. The technical program of ICWS 2014 will include a Research Track, an Application & Experience Track, an Industry Track, and a Work-in-Progress Track. The ICWS 2014 tracks seeks original, UNPUBLISHED research papers reporting substantive new work in various aspects of Web-based services. Research Track papers MUST clearly indicate their contributions to the field of Web-based services and properly cite related work in the field, such as those published in the proceedings of ICWS, SCC, CLOUD, SERVICES, APSCC, ECOWS, and related journals including TSC, JWSR, and IJBPIM.