The CD-ROM contains the same published parts musicians have been using for many years. Works are viewable and printable on PC or Macintosh. No access codes or special software are required. The CD uses Adobe Acrobat Reader technology which is included on the CD. This volume includes parts to later operas, including "Das Rheingold;" "Die Walkure;" "Siegfried;" "Gotterdammerung;" "Die Meistersinger von Nurnberg" and "Parsifal."