| Program | 1401 | Windows |
| Signal version 1 1 | Standard 1401 to Micro1401 mk 2 | 3.1 to XP 2 |
| Signal version 2 1 | Standard 1401 to Micro1401 mk 2 | 95 to Win7 3 |
| Signal version 3 | Standard 1401 to Micro1401-3 | 95 to Win7 3 |
| Signal version 4 | Standard 1401 to Micro1401-3 | 98 to Win7 4 |
| Signal version 5 | 1401plus to Micro1401-3 | 98 to Win7 4 |
| Signal version 5.09 | 1401plus to Micro1401-3 | 2000 to Win7 |
| Spike2 version 2 1 | Standard 1401 to Micro1401 mk 2 | 3.1 to XP 2 |
| Spike2 version 3 1 | Standard 1401 to Micro1401 mk 2 | 95 to Win7 3 |
| Spike2 version 4 1 | 1401plus to Micro1401 mk 2 | 95 to Win7 3 |
| Spike2 version 5 | 1401plus to Micro1401-3 | 95 to Win7 3 |
| Spike2 version 6 | 1401plus to Micro1401-3 | 98 to Win7 4 |
| Spike2 version 7 | 1401plus to Micro1401-3 | 2000 to Win7 |
Where Standard 1401 or 1401plus are mentioned, they will be usable, but significant features of the software may not be available.
We have tried as hard as possible to make sure that the information on Windows version compatibility is correct, but there may be circumstances where old software with new Windows versions (or vice-versa) give problems.
The complete list of 1401 types (in order of development) is: Standard 1401, 1401plus, Micro1401 mk 1, Power1401 mk 1, Micro1401 mk 2, Power1401 mk 2, Micro-3.
Notes: