Zero divided by zero

@inproceedings{McDonnell1976ZeroDB,
  title={Zero divided by zero},
  author={Eugene E. McDonnell},
  booktitle={APL '76},
  year={1976}
}
Current implementations of APL give one as the result of zero divided by zero. This paper gives the reasons for proposing that this quotient be changed to zero. Two conventions introduced by K. E. Iverson [1] for the exposition of mathematical topics are used here.