when the expression and the idea are inextricably merged. Later the same year, in Broderbund v. Unison the court cited Whelan when finding that the overall structure, sequencing, and arrangement of screens, or the "total concept and feel", could be protected by copyright. References Notes Citations Sources Further reading United States copyright case law United States Court of Appeals for the Third Circuit cases 1986 in United States case law Dental software United States computer case law Dentistry in the United States