The following compatibility issues persist for the arithmetic theory:

Table 9: Compatibility Matrix for the Arithmetic Theory

Nr |
Description |
System |

1 |
Has only integer operations. |
DEC10 |

2 |
Has 18-bit masking short hands (! $). |
DEC10 |

3 |
Has ASCII value operator (.). |
DEC10 |

4 |
Does not have decimals. |
ISO |

5 |
Does not require widening. |
ISO |

6 |
Does not require narrowing. |
ISO |