Specifying Open Systems In this two-day course, system specifiers, architects, contractors, and consultants will learn how to specify LonWorks technology and select the components necessary for building controls applications. You will learn how to specify and select the devices for truly open, interoperable LonWorks technology building controls systems. This course provides practical, hands-on experience using simple examples, job aids, and network tools for specifying LonWorks networks and open systems.