Are software logic, structure and sequence protectable by copyright?

Laurence O. Masson. Are software logic, structure and sequence protectable by copyright?. In Thirty-Fourth IEEE Computer Society International Conference: Intellectual Leverage, COMPCON Spring 89, San Francisco, CA, USA, February 27 - March 3, 1989, Digest of Papers. pages 370-373, IEEE, 1989. [doi]

@inproceedings{Masson89,
  title = {Are software logic, structure and sequence protectable by copyright?},
  author = {Laurence O. Masson},
  year = {1989},
  doi = {10.1109/CMPCON.1989.301960},
  url = {https://doi.org/10.1109/CMPCON.1989.301960},
  researchr = {https://researchr.org/publication/Masson89},
  cites = {0},
  citedby = {0},
  pages = {370-373},
  booktitle = {Thirty-Fourth IEEE Computer Society International Conference: Intellectual Leverage, COMPCON Spring 89, San Francisco, CA, USA, February 27 - March 3, 1989, Digest of Papers},
  publisher = {IEEE},
  isbn = {0-8186-1909-0},
}