F. Di Maio, L. Abadie, C. Kim, K. Mahajan, P. Makijarvi, D. Stepanov, N. Utzel, A. Wallander ITER Organization, Route de Vinon, CS 90 046, 13067 Saint Paul-lez-Durance Cedex, France 13th International Conference on Accelerator and Large Experimental Physics Control Systems (ICALEPCS 2011) 10-14th October 2011 Grenoble, France Abstract Most of the systems that constitutes the ITER plant will be built and supplied by the seven ITER domestic agencies. These plant systems will require their own Instrumentation and Control (I&C) that will be procured by the various suppliers. For improving the homogeneity of these plant system I&C, the CODAC group, that is in charge of the ITER control system, is promoting standardized solutions at project level and makes available, as a support for these standards, the software for the development and tests of the plant system I&C. The CODAC Core System is built by the ITER Organization and distributed to all ITER partners. It includes the ITER standard operating system, RHEL, and the ITER standard control framework, EPICS, as well as some ITER specific tools, mostly for configuration management, and ITER specific software modules, such as drivers for standard I/O boards. A process for the distribution and support is in place since the first release, in February 2010, and has been continuously improved to support the development and distribution of the following versions.