Annotation loud computing has recently gained great attention from both academia and IT industry as a new infrastructure requiring smaller investments in hardware platform, staff training, or licensing new software tools Cloud computing can be seen as any subscription based or pay per use service that, extends the Internet existing capabilities CLOUDTECH 2015 will address topics related to cloud technologies architecture and applications including distributed computing and data centers, cloud infrastructure and its security, end user services The conference will provide a high level, international forum for scientists, researchers, professionals and students who will have the opportunity to present state of the art research results, address new challenges, and discuss trends in Cloud Technology and applications