DUBLIN--(BUSINESS WIRE)--Research and Markets (http://www.researchandmarkets.com/research/h58zsh/global) has announced the addition of the "Global IT-as-a-Service (ITaaS) Market 2015-2019" report to their offering. ITaaS is an IT operational method, providing an enterprise with the required amount of hardware, software, and support. Nowadays, companies have been using the ITaaS model to increase the usage of virtualization as it is not limited to cloud computing technology models such as SaaS,