LONMARK International announced the expansion of the Building Open Systems Seminar Series to Columbus, Philadelphia, and San Diego. The multi-city addition comes as demand for the free seminars rises throughout North America.

The free seminars will visit Columbus, OH on May 18, Philadelphia on May 20, and San Diego on May 24. Seminars are also scheduled in the following cities throughout the month of May: Chicago, Detroit, Indianapolis, Montreal, and Toronto with additional seminars taking place in Europe and Asia.

"We've had over 1,800 people attend our free seminars worldwide," said Barry Haaser, executive director of LONMARK International. "Attendees consistently tell us how valuable they find the content and how impressed they are with the quality of the seminars. As word of the successful seminars spread throughout the country we received several requests to add cities. After careful consideration we decided to narrow the selection to Columbus, Philadelphia, and San Diego. For more information, visit www.buildingopensystems.com.