System requirements Fosim 4.2.1
| Operating System | Microsoft Windows 95 or newer | |
| Processor | Minimum: | Intel Pentium III |
| Recommended: | Intel Pentium IV or AMD Athlon XP | |
| Memory | Minimum: | 32 MB |
| Recommended: | 128 MB | |
| Graphics | Minimum: | 256 colours, 800x600 pixels |
| Recommended: | 16 million colours, 1024x768 pixels | |
| HD space | Minimum: | 5 MB |
| Language | The user interface is available in both Dutch and English. Documentation (user manual and help files) are only available in Dutch. | |