The Connections CD is said to be a resource for system designers and building owners seeking solutions for inter-operability. The CD’s content ranges from introductory background on protocols to detailed info on designing and specifying open systems. Users can choose from over one hour of video, interactive, or printable material, and view those sections of most interest to them. Detailed technical information on applying the BACnet® and LonMark® protocols is included. A glossary aids in understanding terminology and acronyms. The Trane Co., 3600 Pammel Creek Rd., La Crosse, WI 54601-7599; 608-787-3355 (fax);; (Web site).