Microsoft Office Web Apps Service Pack 2 (SP2) provides the latest updates for Office Web Apps. Additionally, this service pack includes two kinds of fixes:
Previously unreleased fixes that were created specifically for this service pack. In addition to general product fixes, these fixes include improvements in stability, performance, and in security.
All the public updates that were released through May 2013, and all the cumulative updates that were released through April 2013.
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