[Alan] has just posted an Ubuntu screencast that will take you through a crash course in the Ubuntu repositories. If you are new to Ubuntu this will give you a much better grasp on how software repositories are handled.
The different types of updates are discussed: Security updates fix bugs that cause a system vulnerability. Updates (generic) are for bug fixes that aren’t a security threat. Proposed updates are for testing before an update hits the ‘updates’ section. Finally, backports are updates from a newer version that have been ‘backported‘ so systems running older versions of Ubuntu can have…

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This DVD5 ISO image file contains the security updates for Windows released on Windows Update on August 11th 2009 The image does not contain security updates for other Microsoft products This DVD5 ISO image is intended for administrators that need to download multiple individual language versions of each security update and that do not use an automated solution such as Windows Server Update Services WSUS You can use this ISO image to download multiple updates in all languages at the same time

The 2007 Microsoft Office Servers Service Pack 2 SP2 provides the latest updates to all of the 2007 Microsoft Office System servers
This download includes two types of fixes Previously unreleased fixes that were made specifically for this service pack In addition to general product fixes this includes improvements in stability performance and security All of the Public Updates Security Updates Cumulative Updates and Hotfixes released through February 2009
Service Pack 2 will update the following Microsoft Office SharePoint Server 2007 Microsoft Office Project Server 2007 Microsoft Office Forms Server 2007 Microsoft Search Server 2008 Microsoft Search Server 2008 Express…