OPC 관련 내용

http://www.codeproject.com/Articles/12441/OPC-Technology

http://www.prosysopc.com/opc-ua-java-sdk.php

http://www.sensorsmag.com/sensors-mag/relational-databases-vs-plant-data-historians%E2%80%94which-one-is-r-1387

http://www.opcdatahub.com/Features/OPC_to_LinuxQNX.html