'''Refined Printing Command Stream''', also known as '''RPCS''', is a [[Vector graphics|vector-based]]<ref name="zeno">[http://zx.zeno.com/Benchmarks/benchmark_overview.htm#Zx_vs._PCL,_UFR,_RPCS,_and_JetReady_4.2 Zenographics Zx-protocol comparison and overview]</ref> printing/duplicating control [[Protocol (computing)|protocol]], designed for communication between Microsoft Windows PC clients, and several lines of [[Ricoh]] copiers. Drivers provided by Ricoh install the chosen copier to behave as a printer device.
The size-efficiency of the protocol is comparable to [[Printer Command Language#PCL 6 overview|PCL6]].<ref>[http://zx. name="zeno.com"/Benchmarks/benchmark_overview.htm#Zx_vs._PCL,_UFR,_RPCS,_and_JetReady_4.2 Zenographics Zx-protocol comparison and overview]</ref>.
