This invaluable guide to theatrical production includes up-to-date definitions of all technical aspects of stagecraft, including the many advances in the past decade, particularly in the areas of trusses, rigging, and automated lights and their control. More than 200 terms, along with 25 new drawings, have been added, many existing definitions have been expanded and drawings revised to include new technological developments, and World Wide Web addresses have been added to the List of Manufacturers and Distributors and to the Bibliography. At the same time, older terminology and definitions have been retained so the book will remain useful for those unable to participate in the high-tech revolution.