| Used Operating Systems |
| 1 | 2758 | 81.43 | 536 | 81.21 | Windows NT |
| 2 | 255 | 7.53 | 53 | 8.03 | +http://www.google.com/bot.html |
| 3 | 70 | 2.07 | 10 | 1.52 | Intel Mac OS X 10.6 |
| 4 | 63 | 1.86 | 1 | 0.15 | +http://www.puritysearch.net/ |
| 5 | 50 | 1.48 | 8 | 1.21 | Linux i686 [unknown version] |
| 6 | 48 | 1.42 | 8 | 1.21 | Intel Mac OS X 10.5 |
| 7 | 46 | 1.36 | 17 | 2.58 | http://help.yahoo.com/help/us/ysearch/sl... |
| 8 | 22 | 0.65 | 6 | 0.91 | http://www.dotnetdotcom.org/, crawler@do... |
| 9 | 18 | 0.53 | 3 | 0.45 | Intel Mac OS X |
| 10 | 17 | 0.50 | 2 | 0.30 | Linux [unknown version] |
| 11 | 14 | 0.41 | 2 | 0.30 | Intel Mac OS X 10.4 |
| 12 | 8 | 0.24 | 4 | 0.61 | +http://about.ask.com/en/docs/about/webm... |
| 13 | 6 | 0.18 | 1 | 0.15 | MirrorDetector; +http://yandex.com/bots |
| 14 | 2 | 0.06 | 2 | 0.30 | Win32 |
| 15 | 2 | 0.06 | 2 | 0.30 | http://www.orgtheweb.org |
| 16 | 2 | 0.06 | 2 | 0.30 | Windows NT 5.2 |
| 17 | 2 | 0.06 | 1 | 0.15 | +http://yandex.com/bots |
| 18 | 2 | 0.06 | 1 | 0.15 | +info@netcraft.com |
| 19 | 2 | 0.06 | 1 | 0.15 | crawler@nigma.ru |
