| Used Operating Systems |
| 1 | 55410 | 45.57 | 510 | 3.02 | http://www.majestic12.co.uk/bot.php?+ |
| 2 | 21891 | 18.00 | 12439 | 73.74 | +http://ahrefs.com/robot/ |
| 3 | 16221 | 13.34 | 1217 | 7.21 | Windows NT |
| 4 | 15706 | 12.92 | 662 | 3.92 | http://www.opensiteexplorer.org/dotbot, ... |
| 5 | 5782 | 4.76 | 6 | 0.04 | +http://OpenLinkProfiler.org/bot |
| 6 | 999 | 0.82 | 481 | 2.85 | +http://www.google.com/bot.html |
| 7 | 816 | 0.67 | 134 | 0.79 | +http://www.linkdex.com/bots/ |
| 8 | 815 | 0.67 | 110 | 0.65 | +http://yandex.com/bots |
| 9 | 722 | 0.59 | 557 | 3.30 | +http://www.baidu.com/search/spider.html |
| 10 | 720 | 0.59 | 143 | 0.85 | http://help.yahoo.com/help/us/ysearch/sl... |
| 11 | 648 | 0.53 | 176 | 1.04 | +http://www.bing.com/bingbot.htm |
| 12 | 562 | 0.46 | 4 | 0.02 | +http://www.warebay.com/bot.html |
| 13 | 526 | 0.43 | 86 | 0.51 | Mail.RU_Bot/2.0; +http://go.mail.ru/help... |
| 14 | 184 | 0.15 | 97 | 0.58 | Windows 95 |
| 15 | 78 | 0.06 | 16 | 0.09 | Windows 98 |
| 16 | 64 | 0.05 | 6 | 0.04 | +http://siteexplorer.info/ |
| 17 | 62 | 0.05 | 57 | 0.34 | +http://www.uptime.com/uptimebot |
| 18 | 50 | 0.04 | 20 | 0.12 | MSIE 5.5; Windows NT 4.0 |
| 19 | 50 | 0.04 | 20 | 0.12 | +http://napoveda.seznam.cz/en/seznambot-... |
| 20 | 39 | 0.03 | 3 | 0.02 | +http://webmeup-crawler.com/ |
| 21 | 32 | 0.03 | 12 | 0.07 | Windows CE |
| 22 | 28 | 0.02 | 10 | 0.06 | Windows 3.1 |
| 23 | 23 | 0.02 | 17 | 0.10 | Windows ME |
| 24 | 22 | 0.02 | 16 | 0.09 | ) - BrowseX (2.0.0 Windows |
| 25 | 19 | 0.02 | 15 | 0.09 | Windows 2000 |
| 26 | 19 | 0.02 | 4 | 0.02 | Windows XP |
| 27 | 18 | 0.01 | 2 | 0.01 | +http://www.seokicks.de/robot.html |
| 28 | 17 | 0.01 | 14 | 0.08 | Auto; Windows |
| 29 | 12 | 0.01 | 6 | 0.04 | +http://fulltext.sblog.cz/ |
| 30 | 10 | 0.01 | 2 | 0.01 | +http://www.semrush.com/bot.html |
| 31 | 9 | 0.01 | 0 | 0.00 | Wayback Machine Live Record; +http://arc... |
| 32 | 9 | 0.01 | 9 | 0.05 | +http://www.xovibot.net/ |
| 33 | 8 | 0.01 | 8 | 0.05 | MSIE 5.5; Windows NT 5.0 |
| 34 | 8 | 0.01 | 4 | 0.02 | +http://www.exabot.com/go/robot |
| 35 | 4 | 0.00 | 2 | 0.01 | http://www.botje.com/plukkie.htm |
| 36 | 2 | 0.00 | 1 | 0.01 | X11 |
| 37 | 2 | 0.00 | 2 | 0.01 | +info@netcraft.com |
