| Operating System | Hosts | Highest Uptime |
|---|
| BeOS |
2 |
1 Hours 32 Minutes |
| Darwin |
15 |
89 Days 12 Hours 40 Minutes |
| Embedded |
67 |
1 Years 131 Days 2 Hours 27 Minutes |
| FreeBSD |
91 |
5 Years 64 Days 17 Hours 37 Minutes |
| Linux |
454 |
3 Years 327 Days 2 Hours 29 Minutes |
| Mac OS X |
1 |
1 Days 2 Hours 43 Minutes |
| mIRC |
1 |
18 Days 18 Hours 13 Minutes |
| NetBSD |
9 |
2 Years 364 Days 6 Hours 49 Minutes |
| OpenBSD |
17 |
2 Years 76 Days 4 Hours 39 Minutes |
| OpenVMS |
15 |
1 Years 228 Days 43 Minutes |
| OpenVMSClust |
4 |
13 Years 180 Days 14 Hours 49 Minutes |
| OpenVMSCluster |
1 |
10 Years 5 Days 1 Hours 17 Minutes |
| OS/2 |
3 |
250 Days 7 Hours 50 Minutes |
| Unknown |
1 |
49 Days 16 Hours 41 Minutes |
| Windows |
751 |
272 Years 74 Days 12 Hours 28 Minutes |