Is POPL mathematics or science?

Andrew W. Appel. Is POPL mathematics or science?. SIGPLAN Notices, 27(4):87-89, 1992. [doi]

@article{Appel92,
  title = {Is POPL mathematics or science?},
  author = {Andrew W. Appel},
  year = {1992},
  doi = {10.1145/131080.131091},
  url = {http://doi.acm.org/10.1145/131080.131091},
  tags = {e-science},
  researchr = {https://researchr.org/publication/Appel92},
  cites = {0},
  citedby = {0},
  journal = {SIGPLAN Notices},
  volume = {27},
  number = {4},
  pages = {87-89},
}