Analysis of information sources in references of the Wikipedia article "클라우드 컴퓨팅" in Korean language version.
Nowadays Service-Oriented Architecture (SOA) has become as [sic] the main architectural model of many IT initiatives including grid, cloud and everything as a service (Essa\XaaS\aas) computing.
Cloud Computing provides services on a stack composed of three service layers (Hurwitz, Bloor, Kaufman, & Halper, 2009): Infrastructure as a Service (IaaS), Platform as a Service (PaaS), and Software as a Service (SaaS).