| Tree | Description |
|---|---|
| sysctl | Sysctl internal magic |
| kern | High kernel, proc, limits &c |
| vm | Virtual memory |
| vfs | File system |
| net | Network, (see socket.h) |
| debug | Debugging |
| hw | hardware |
| machdep | machine dependent |
| user | user-level |
| p1003_1b | p1003_1b, (see p1003_1b.h) |
| sys | sys |
| dev | |
| security | Security |
| compat | Compatibility code |