# RealPresence DMA System Editions

The RealPresence DMA system is available in an Appliance Edition (for use with a Polycom Rack Server) and a Virtual Edition (packaged as software only).

Most of the functionality described in this document applies to both editions, and so the product references are general–that is, the RealPresence DMA system. However, when information applies to a specific edition, the reference will be specific–that is, RealPresence DMA , Virtual Edition or RealPresence DMA, Appliance Edition.