This document discusses Microsoft Application Virtualization (App-V) which allows applications to be packaged and delivered virtually to users. With App-V, applications can be centrally managed, streamed on demand, run in isolation without installing on machines, and cached locally for offline use. App-V improves application compatibility, simplifies deployment and management, and reduces help desk calls and testing requirements compared to traditional application installation methods. The document also discusses how App-V can be used with Remote Desktop Services (RDS) and how it integrates with other Microsoft desktop and application virtualization technologies like MED-V.