| Codename | Kato, Sparta |
| Kernel | 3.1 |
| Architectures | 16-Bit |
| Languages |
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| Release date | 27/10/1992 |
| Support date | 31/12/2001 |
| Extended date | 01/01/1970 |
| Replaces | Microsoft Windows 3.1 |
| Replaced | Microsoft Windows for Workgroups 3.11 |