This IDC study specifically forecasts public IT cloud revenue generated from U.S. small and midsize businesses. It contains 2011 and 2012 actual data and 2013–2017 forecasts for SMB spending. Private and hybrid cloud services, as defined in IDC's Worldwide IT Cloud Service Taxonomy, 2012 (March 2012), are excluded from this study.
On an aggregate level, the data is segmented by cloud service category: SaaS, IaaS, and PaaS. Each of those categories is also forecast by SMB segment: microbusiness (<10 employees), small business (10–99 employees), and midsize business (100–999 employees). "U.S. SMBs are quickly becoming an attractive segment for a variety of cloud and mobile solutions." — Chris Chute, research director, Small and Mid-Sized Business Practice