IE6 Only ================== _selector {...} IE6 & IE7 ================== *html or { _property: } IE7 Only ================== *+html or { *property: } - Keep in mind that you have to put the IE7 property first within the same selector. IE8 ================== .selector/*\**/ { color:#f00; } **NOTE**: LESS v1.5.0 shoots out an error when compiling the CSS if you use this hack :/ IE8 and IE9 (TOTALLY NOT NEEDED - I LEFT HERE FOR REFERENCE ONLY) ================== .selector { color:#f00\9; } - http://stackoverflow.com/questions/660652/ie8-css-selector The above solution doesn't work with font-family, so instead you need to use "\0/ !important" Example: { font-family:Arial \0/ !important; } http://dimox.net/personal-css-hacks-for-ie6-ie7-ie8/ Also, using "\9" is picked up by IE10 and IE11 so you need to redeclare the CSS rules with "-ms-high-contrast:". See info below. IE9 Only ================== :root .class/#id { property:value \0/IE9; } **NOTE**: Prepos v4.0.1 shoots out an error when compiling the CSS if you use this hack :/ http://blog.vervestudios.co/blog/post/2011/05/13/IE9-Only-CSS-Hack.aspx IE10 Only ================== Method 1: UA Sniffing, which isn't the most loved method to target browsers, but here it is anyway. http://css-tricks.com/ie-10-specific-styles/ Place this script in the : Usage: html[data-useragent*='MSIE 10.0'] .selector {...} Method 2: It used 'Conditional compilation' which is not UA sniffing. Also, it excludes IE11 as well. http://www.impressivewebs.com/ie10-css-hacks/ Conditional compilation: https://msdn.microsoft.com/en-us/library/8ka90k2e(v=vs.94).aspx Place this script in the : Note: Seems the Conditional Comment is not necessary, but I like to include it for good measure. Usage: .ie10 .selector {...} == More info here: https://philipnewcomer.net/2014/04/target-internet-explorer-10-11-css/ IE10 and IE11 ================== @media screen and (-ms-high-contrast: active), (-ms-high-contrast: none) { .selector { property:value; } }