This document provides an overview of the Microsoft Desktop Optimization Pack (MDOP), specifically the Application Virtualization (App-V) component. It discusses how App-V allows applications to run without being installed locally, eliminating compatibility issues between different application versions running on the same machine. The document demonstrates how App-V can publish virtualized applications that appear on the desktop like normally installed applications. It also shows how App-V enables different versions of Java to be used by different applications and allows desktop sharing by only showing users their assigned applications.