The Experimental Physics and Industrial Control System (EPICS), has been used at a number of sites for performing data acquisition, supervisory control, closed-loop control, sequ,ential control, and operational optimization. The EPICS architecture was originally developed by a group with diverse backgrounds in physics and industrial control. The current architecture represents one instance of the 'standard model'. It provides distributed processing and communication from any LAN device to the front end controllers. This paper will present the genealogy, current architecture, performance envelope, current installations, and planned extensions for requirements not met by the current architecture.

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This paptr dcwnf?cs W tfcslgrr and Implcmcntaliorr 01'hc I.OS Alamos moduhr RF c(mtml syslcm, which prrrvid~hlghpcrforrnancc Iccdhack and/or Iccdforward uonwol of RF wcelermor cavmrcs. This is a flcxlblc, modular crmrol syslcm which has been rcali~cd in dw irrduwry-srandard VXI cardmcx.iular formal. A wdc specLrum of sysu?m functionality can be accommodated simply by incorporating only lhosc modules and fcmrrcs rcqu~r(d frrr u particular application. The fundamental prlrrclplcs r-)1tic r,h!sign approach are discussed. Dcmlls nf tic VX1 implcmcnLaurm arc given, including the Wcrn architwturc and intcrfaccs, Pcri"ormitrrcc~~pabll]lics, and iivaiiiibk fcatums.