This IDC Forecast Update revises the data in Worldwide and Americas Software Channel 2011–2015 Forecast: A Preliminary View (August 2011). This update includes a look at final 2010 results as well as an updated 2011–2015 forecast for worldwide and Americas software channel revenue. This Forecast Update also includes a review of channel trends by secondary market that impact the numbers in this forecast. Historical and forecast revenue data are shown for the total worldwide market, by primary market and geographic region. This document does not contain vendor-specific revenue, market shares, or vendor profiles, some of which were published in separate documents in 2011 and will be updated in 2012.