For more information, please visit the following pages:

• Opera
• Opera Software ASA
• Presto

Latest user agents (if you are looking for complete list, download it here):

• Opera/9.51 (X11; Linux i686; U; Linux Mint;
• Opera/9.51.(Windows CE; de-BE) Presto/2.9.172 Version/10.00
• Opera/9.51 (Windows NT 5.3; U; FA Presto/2.9.187 Version/10.00)
• Opera/9.51 (Windows NT 5.3; U; EL Presto/2.9.187 Version/11.00)
• Opera/9.51 (Windows NT 5.0; U; MO Presto/2.9.163 Version/11.00)
• Opera/9.51 (Windows NT 6.1; U; ZH Presto/2.9.181 Version/11.00)
• Opera/9.51 (Windows NT 6.1; U; FJ Presto/2.9.185 Version/12.00)
• Opera/9.51 (Windows NT 5.1; U; EU Presto/2.9.176 Version/12.00)
• Opera/9.51 (Windows NT 6.1; U; GD Presto/2.9.170 Version/10.00)
• Opera/9.51 (Windows NT 6.3; U; MS Presto/2.9.168 Version/11.00)
• Opera/9.51 (Windows NT 6.3; U; FY Presto/2.9.167 Version/12.00)
• Opera/9.51 (Windows NT 5.2; U; AR Presto/2.9.177 Version/12.00)
• Opera/9.51 (Windows NT 5.0; U; HY Presto/2.9.163 Version/12.00)
• Opera/9.51 (Windows NT 6.0; U; NB Presto/2.9.173 Version/12.00)
• Opera/9.51 (Windows NT 5.1; U; SC Presto/2.9.163 Version/11.00)
• Opera/9.51 (Windows NT 5.1; U; LT Presto/2.9.168 Version/12.00)
• Opera/9.51 (X11; Linux x86_64; U; HI Presto/2.9.171 Version/11.00)
• Opera/9.51 (Windows NT 6.2; U; LN Presto/2.9.190 Version/12.00)
• Opera/9.51 (X11; Linux i686; U; AS Presto/2.9.173 Version/11.00)
• Opera/9.51 (Macintosh; Intel Mac OS X 10.6.0 U; LB Presto/2.9.161 Version/10.00)
• Opera/9.51 (Windows NT 5.1; U; SR Presto/2.9.185 Version/10.00)
• Opera/9.51 (Windows NT 6.0; U; RO Presto/2.9.186 Version/12.00)
• Opera/9.51 (Windows NT 5.3; U; OC Presto/2.9.176 Version/10.00)
• Opera/9.51 (Windows NT 5.2; U; NE Presto/2.9.174 Version/11.00)
• Opera/9.51 (Windows NT 5.1; U; CA Presto/2.9.169 Version/10.00)
• Opera/9.51 (Windows NT 5.0; U; PT Presto/2.9.178 Version/10.00)
• Opera/9.51 (Windows NT 6.0; U; FA Presto/2.9.185 Version/10.00)
• Opera/9.51 (Macintosh; Intel Mac OS X 10.7.4 U; EN Presto/2.9.172 Version/11.00)
• Opera/9.51 (Windows NT 5.2; U; SC Presto/2.9.166 Version/11.00)
• Opera/9.51 (Windows NT 6.0; U; HT Presto/2.9.188 Version/11.00)
• Opera/9.51 (Windows NT 6.3; U; MK Presto/2.9.160 Version/11.00)
• Opera/9.51 (Windows NT 6.1; U; BS Presto/2.9.167 Version/11.00)
• Opera/9.51 (Windows NT 6.0; U; JA Presto/2.9.178 Version/10.00)
• Opera/9.51 (Windows NT 6.0; U; SK Presto/2.9.161 Version/10.00)
• Opera/9.51 (Windows NT 6.0; U; SW Presto/2.9.172 Version/12.00)
• Opera/9.51 (Windows NT 6.3; U; YI Presto/2.9.163 Version/11.00)
• Opera/9.51 (Windows NT 5.1; U; SR Presto/2.9.166 Version/10.00)
• Mozilla/5.0 (Windows NT 5.1; U; en; rv:1.8.1) Gecko/20061208 Firefox/2.0.0 Opera 9.51
• Opera/9.51 (X11; Linux i686; U; Linux Mint; en)
• Opera/9.51 (Windows NT 5.1; U; nn)
• Mozilla/5.0 (Windows NT 5.1; U; en-GB; rv:1.8.1) Gecko/20061208 Firefox/2.0.0 Opera 9.51
• Opera/9.51 (Windows NT 5.1; U; da)
• Opera/9.51 (Windows NT 5.1; U; en-GB)
• Opera/9.51 (Windows NT 6.0; U; es)
• Opera/9.51 (Windows NT 5.1; U; es-LA)
• Opera/9.51 (Windows NT 5.1; U; es-AR)
• Opera/9.51 (X11; Linux i686; U; de)
• Opera/9.51 (Windows NT 6.1; U; MRSPUTNIK OW 2, 3, 0, 208; ru)
• Opera/9.51 (Windows NT 5.1; U; fr)
• Mozilla/5.0 (Windows NT 5.1; U; de; rv:1.8.1) Gecko/20061208 Firefox/2.0.0 Opera 9.51
• Opera/9.51 (Windows NT 5.1; U; MRA 5.6 (build 03278); MRSPUTNIK OW; ru)
• Opera/9.51 (Windows NT 6.0; U; MRA 5.6 (build 03278); MRSPUTNIK OW 2, 2, 0, 94; ru)
• Opera/9.51 (Windows NT 5.1; U; MRA 5.7 (build 03796); ru)
• Opera/9.51 (Windows NT 5.1; U; MRA 8.0 (build 6007); ru)
• Opera/9.51 (Windows NT 5.1; U; MRSPUTNIK OW 2, 3, 0, 289; ru)
• Opera/9.51 (Windows NT 5.1; U; MRA 5.7 (build 03686); MRSPUTNIK OW 2, 3, 0, 244; en)
• Opera/9.51 (Windows NT 5.1; U; MRA 5.6 (build 03278); MRSPUTNIK OW 2, 2, 0, 94; ru)
• Opera/9.51 (Windows NT 5.1; U; MRA 5.4 (build 02625); ru)
• Opera/9.51 (Windows NT 5.1; U; MRA 5.7 (build 03686); MRSPUTNIK OW 2, 3, 0, 244; ru)
• Mozilla/5.0 (Windows NT 5.1; U; ru; rv:1.8.1) Gecko/20061208 Firefox/2.0.0 Opera 9.51
• Opera/9.51 (Windows NT 5.1; U; MRA 5.5 (build 02842); ru)
• Opera/9.51 (Windows NT 5.1; U; MRA 5.5 (build 02842); en)
• Opera/9.51 (Windows NT 5.2; U; ru)
• Opera/9.51 (Windows NT 5.1; U; MRA 5.7 (build 03790); ru)
• Opera/9.51 (Windows NT 6.0; U; MRA 5.5 (build 02842); ru)
• Opera/9.51 (Windows NT 5.1; U; MRA 5.5 (build 02810); ru)
• Opera/9.51 (Windows; U; de)
• Mozilla/5.0 (Windows NT 6.0; U; en; rv:1.8.1) Gecko/20061208 Firefox/2.0.0 Opera 9.51
• Opera/9.51 (Windows NT 6.0; U; en-GB)
• Opera/9.51 (X11; Linux i686; U; fr)
• Opera/9.51 (Windows NT 5.2; U; MRA 6.0 (build 5711); en)
• Opera/9.51 (Windows NT 5.1; U; MRA 5.3 (build 02564); en)
• Opera/9.51 (Windows NT 5.1; U; MRA 6.0 (build 5831); en)
• Opera/9.51 (Windows NT 6.1; U; ru)
• Opera/9.51 (Windows NT 5.1; U; MRA 5.5 (build 02830); ru)
• Opera/9.51 (Windows NT 6.0; U; MRA 5.6 (build 03385); ru)
• Opera/9.51 (Windows NT 6.1; U; MRA 5.6 (build 03385); MRSPUTNIK OW 2, 3, 0, 104; ru)
• Opera/9.51 (Windows NT 5.1; U; ; MRSPUTNIK OW 2, 3, 0, 104; MRA 5.10 (build 5310); en)
• Opera/9.51 (Windows NT 6.2; U; MRA 6.0 (build 5754); en)
• Opera/9.51 (Windows NT 6.1; U; MRA 5.6 (build 03402); MRSPUTNIK OW 2, 3, 0, 238; ru)
• Opera/9.51 (Windows NT 6.1; U; MRA 6.0 (build 5680); ru)
• Opera/9.51 (Windows 98; U; ru)
• Opera/9.51 (Windows NT 6.0; U; IBM EVV/3.0/EAK01AG9/LE; ru)
• Opera/9.51 (Windows NT 6.0; U; MRA 6.0 (build 5711); en)
• Opera/9.51 (Windows NT 6.0; U; sv)
• Opera/9.51 (Windows NT 5.2; U; en)
• Opera/9.51 (Windows NT 5.1; U; pl)
• Opera/9.51 (Windows NT 6.2; U; IBM EVV/3.0/EAK01AG9/LE; ru)
• Opera/9.51 (Windows NT 5.1; U; it)
• Opera/9.51 (Windows NT 6.1; U; ; MRSPUTNIK OW 2, 3, 0, 228; en)
• Opera/9.51 (Windows NT 5.1; U; MRA 5.7 (build 03797); en)
• Opera/9.51 (Windows NT 5.1; U; ; MRSPUTNIK OW 2, 3, 0, 216; MRA 5.7 (build 03653); ru)
• Opera/9.51 (Windows NT 5.1; U; MRA 5.6 (build 03278); MRSPUTNIK OW 2, 3, 0, 228; en)
• Opera/9.51 (Windows NT 6.0 U en)
• Opera/9.51 (Windows NT 6.0; U; ; MRSPUTNIK OW 2, 3, 0, 104; ru)
• Opera/9.51 (Windows NT 5.1; U; MRSPUTNIK OW 2, 3, 0, 244; ru)
• Opera/9.51 (Macintosh; Intel Mac OS X; U; en)
• Opera/9.51 (Windows NT 5.1; U; ; MRSPUTNIK OW 2, 3, 0, 104; ru)
• Opera/9.51 (Windows NT 6.2; U; ru)
• Opera/9.51 (Windows NT 5.1; U; en)