Application compatibility

Introduced in 7.1 SP3

Application Compatibility functionaly was first introduction in Application Control 7.1 SP3

When addressing application compatibility issues in preparation for a deployment of Windows® 7, among the most flexible and powerful tools available are application compatibility fixes, or shims. However, most organizations do not leverage shims to the extent that they could, either because they don't understand the underlying technology or because they do not have a process in place to manage shims over the lifetime of the applications they manage.
Microsoft Technet

With the introduction of Application Control 7.1 SP3, Arellia has attempted to minimise the process in place to analyze Application Compatibility requirements and simplify the ongoing management of Application Compatibility requirements of applications.

Application compatibility features

Chris Jackson from Microsoft is known as the "AppCompat Guy", and most useful information is from Chris. Links include: