This IDC Forecast Update recasts IDC's long-term forecast (through 2009) in light of 1H05 data and discusses the major dynamics impacting the forecast. Changes to IDC's initial U.S. WLAN Equipment 2005?2009 Forecast by Vertical Market (IDC #33760, August 2005) include both refined industry segmentation and alterations to the projected forecast trends. An explanation of those changes and the rationale that motivated them is subsequently offered.

The alterations of the vertical market forecast are based on some or all of the following resources:

Changes to IDC's historical storage systems segmentation by vertical market are considered one-time market corrections and are expected to be stable in the future. These changes are based on improved understanding of technology penetration in specific vertical markets, IT intensity levels, and general firmographic information.