| Used Operating Systems |
| 1 | 12621 | 40.73 | 125 | 1.58 | http://www.majestic12.co.uk/bot.php?+ |
| 2 | 4695 | 15.15 | 2980 | 37.62 | +http://ahrefs.com/robot/ |
| 3 | 4005 | 12.92 | 4 | 0.05 | +http://OpenLinkProfiler.org/bot |
| 4 | 2674 | 8.63 | 2189 | 27.64 | +http://www.baidu.com/search/spider.html |
| 5 | 2474 | 7.98 | 913 | 11.53 | Windows NT |
| 6 | 1454 | 4.69 | 718 | 9.06 | +http://www.google.com/bot.html |
| 7 | 1443 | 4.66 | 349 | 4.41 | +http://www.bing.com/bingbot.htm |
| 8 | 627 | 2.02 | 130 | 1.64 | +http://yandex.com/bots |
| 9 | 300 | 0.97 | 152 | 1.92 | Mail.RU_Bot/2.0; +http://go.mail.ru/help... |
| 10 | 216 | 0.70 | 59 | 0.74 | +http://www.linkdex.com/bots/ |
| 11 | 69 | 0.22 | 40 | 0.50 | http://help.yahoo.com/help/us/ysearch/sl... |
| 12 | 69 | 0.22 | 63 | 0.80 | Windows 95 |
| 13 | 56 | 0.18 | 21 | 0.27 | Windows 98 |
| 14 | 37 | 0.12 | 13 | 0.16 | http://www.opensiteexplorer.org/dotbot, ... |
| 15 | 24 | 0.08 | 6 | 0.08 | Windows XP |
| 16 | 24 | 0.08 | 17 | 0.21 | +http://www.exabot.com/go/robot |
| 17 | 18 | 0.06 | 13 | 0.16 | Windows CE |
| 18 | 18 | 0.06 | 18 | 0.23 | Auto; Windows |
| 19 | 18 | 0.06 | 13 | 0.16 | Windows ME |
| 20 | 18 | 0.06 | 9 | 0.11 | +http://duckduckgo.com |
| 21 | 16 | 0.05 | 12 | 0.15 | MSIE 5.5; Windows NT 5.0 |
| 22 | 15 | 0.05 | 15 | 0.19 | apps-spreadsheets; +http://docs.google.c... |
| 23 | 15 | 0.05 | 13 | 0.16 | MSIE 5.5; Windows NT 4.0 |
| 24 | 12 | 0.04 | 6 | 0.08 | http://www.botje.com/plukkie.htm |
| 25 | 12 | 0.04 | 1 | 0.01 | +https://www.lipperhey.com/en/about/ |
| 26 | 10 | 0.03 | 8 | 0.10 | +http://www.xovibot.net/ |
| 27 | 10 | 0.03 | 10 | 0.13 | ) - BrowseX (2.0.0 Windows |
| 28 | 9 | 0.03 | 6 | 0.08 | Windows 3.1 |
| 29 | 8 | 0.03 | 4 | 0.05 | +http://www.meanpath.com/meanpathbot.htm... |
| 30 | 6 | 0.02 | 6 | 0.08 | Windows 2000 |
| 31 | 3 | 0.01 | 2 | 0.03 | +info@netcraft.com |
| 32 | 2 | 0.01 | 0 | 0.00 | Wayback Machine Live Record; +http://arc... |
| 33 | 2 | 0.01 | 2 | 0.03 | +http://www.privacyaware.org |
| 34 | 2 | 0.01 | 0 | 0.00 | +http://www.domainoptima.com/robot |
| 35 | 1 | 0.00 | 1 | 0.01 | http://nmap.org/book/nse.html |
| 36 | 1 | 0.00 | 1 | 0.01 | +http://www.domaintuno.com/robot |
| 37 | 1 | 0.00 | 0 | 0.00 | X11 |
| 38 | 1 | 0.00 | 1 | 0.01 | Linux i586 [unknown version] |
| 39 | 1 | 0.00 | 1 | 0.01 | +http://www.uptime.com/uptimebot |
