diff --git a/README.md b/README.md
index 4585f43..6ecd78c 100644
--- a/README.md
+++ b/README.md
@@ -35,10 +35,14 @@ if (bowser.msie && bowser.version <= 6) {
 
 For all detected browsers the browser version is set in the `version` field.
 
-## Flags set for detected mobile Operating Systems
+## Flags set for detected Operating Systems
 
+  * `mac`
+  *  Windows other than Windows Phone as `windows`
+  *  Windows Phone as `windowsphone`
+  * `linux` for Linux other than `android`, `chromeos`, `webos`, `tizen`, and `sailfish`
+  * `chromeos`
   * `android`
-  * Windows Phone as `windowsphone`
   * `ios` (`iphone`/`ipad`/`ipod`)
   * `blackberry`
   * `firefoxos`
diff --git a/src/bowser.js b/src/bowser.js
index cefeee2..fa4f666 100644
--- a/src/bowser.js
+++ b/src/bowser.js
@@ -24,7 +24,15 @@
     var iosdevice = getFirstMatch(/(ipod|iphone|ipad)/i).toLowerCase()
       , likeAndroid = /like android/i.test(ua)
       , android = !likeAndroid && /android/i.test(ua)
-      , chromeBook = /CrOS/.test(ua)
+      , chromeos = /CrOS/.test(ua)
+      , silk = /silk/i.test(ua)
+      , sailfish = /sailfish/i.test(ua)
+      , tizen = /tizen/i.test(ua)
+      , webos = /(web|hpw)os/i.test(ua)
+      , windowsphone = /windows phone/i.test(ua)
+      , windows = !windowsphone && /windows/i.test(ua)
+      , mac = !iosdevice && !silk && /macintosh/i.test(ua)
+      , linux = !android && !sailfish && !tizen && !webos && /linux/i.test(ua)
       , edgeVersion = getFirstMatch(/edge\/(\d+(\.\d+)?)/i)
       , versionIdentifier = getFirstMatch(/version\/(\d+(\.\d+)?)/i)
       , tablet = /tablet/i.test(ua)
@@ -45,7 +53,7 @@
       , version: versionIdentifier || getFirstMatch(/(?:yabrowser)[\s\/](\d+(\.\d+)?)/i)
       }
     }
-    else if (/windows phone/i.test(ua)) {
+    else if (windowsphone) {
       result = {
         name: 'Windows Phone'
       , windowsphone: t
@@ -65,9 +73,10 @@
       , msie: t
       , version: getFirstMatch(/(?:msie |rv:)(\d+(\.\d+)?)/i)
       }
-    } else if (chromeBook) {
+    } else if (chromeos) {
       result = {
         name: 'Chrome'
+      , chromeos: t
       , chromeBook: t
       , chrome: t
       , version: getFirstMatch(/(?:chrome|crios|crmo)\/(\d+(\.\d+)?)/i)
@@ -95,7 +104,7 @@
         result.version = versionIdentifier
       }
     }
-    else if (/sailfish/i.test(ua)) {
+    else if (sailfish) {
       result = {
         name: 'Sailfish'
       , sailfish: t
@@ -119,7 +128,7 @@
         result.firefoxos = t
       }
     }
-    else if (/silk/i.test(ua)) {
+    else if (silk) {
       result =  {
         name: 'Amazon Silk'
       , silk: t
@@ -146,7 +155,7 @@
       , version: versionIdentifier || getFirstMatch(/blackberry[\d]+\/(\d+(\.\d+)?)/i)
       }
     }
-    else if (/(web|hpw)os/i.test(ua)) {
+    else if (webos) {
       result = {
         name: 'WebOS'
       , webos: t
@@ -161,7 +170,7 @@
       , version: getFirstMatch(/dolfin\/(\d+(\.\d+)?)/i)
       };
     }
-    else if (/tizen/i.test(ua)) {
+    else if (tizen) {
       result = {
         name: 'Tizen'
       , tizen: t
@@ -201,6 +210,12 @@
     } else if (iosdevice) {
       result[iosdevice] = t
       result.ios = t
+    } else if (windows) {
+      result.windows = t
+    } else if (mac) {
+      result.mac = t
+    } else if (linux) {
+      result.linux = t
     }
 
     // OS version extraction
diff --git a/src/useragents.js b/src/useragents.js
index 9a4263a..de560c4 100644
--- a/src/useragents.js
+++ b/src/useragents.js
@@ -75,12 +75,14 @@ module.exports.useragents = {
     , 'Mozilla/5.0 (Windows NT 6.2; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/30.0.1599.17 Safari/537.36': {
         chrome: true
       , version: '30.0'
+      , windows: true
       , webkit: true
       , a: true
       }
     , 'Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/29.0.1547.62 Safari/537.36': {
         chrome: true
       , version: '29.0'
+      , windows: true
       , webkit: true
       , a: true
       }
@@ -88,30 +90,35 @@ module.exports.useragents = {
         chrome: true
       , chromeBook: true
       , version: '29.0'
+      , chromeos: true
       , webkit: true
       , a: true
       }
     , 'Mozilla/5.0 (Windows NT 6.2; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/29.0.1547.2 Safari/537.36': {
         chrome: true
       , version: '29.0'
+      , windows: true
       , webkit: true
       , a: true
       }
     , 'Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/28.0.1468.0 Safari/537.36': {
         chrome: true
       , version: '28.0'
+      , windows: true
       , webkit: true
       , a: true
       }
     , 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_6_7) AppleWebKit/534.24 (KHTML, like Gecko) Chrome/11.0.696.57 Safari/534.24': {
         chrome: true
       , version: '11.0'
+      , mac: true
       , webkit: true
       , c: true
       }
     , 'Mozilla/5.0 (X11; U; Linux i686; en-US) AppleWebKit/534.3 (KHTML, like Gecko) Chrome/6.0.462.0 Safari/534.3': {
         chrome: true
       , version: '6.0'
+      , linux: true
       , webkit: true
       , c: true
       }
@@ -177,6 +184,7 @@ module.exports.useragents = {
       }
     , 'Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/28.0.1500.52 Safari/537.36 OPR/15.0.1147.100': {
         opera: true
+      , windows: true
       , webkit: true
       , version: '15.0'
       , a: true
@@ -200,56 +208,67 @@ module.exports.useragents = {
     , 'Opera/9.80 (Windows NT 6.0) Presto/2.12.388 Version/12.14': {
         opera: true
       , version: '12.14'
+      , windows: true
       , a: true
       }
     , 'Mozilla/5.0 (Windows NT 6.0; rv:2.0) Gecko/20100101 Firefox/4.0 Opera 12.14': {
         opera: true
       , version: '12.14'
+      , windows: true
       , a: true
       }
     , 'Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.0) Opera 12.14': {
         opera: true
       , version: '12.14'
+      , windows: true
       , a: true
       }
     , 'Opera/12.80 (Windows NT 5.1; U; en) Presto/2.10.289 Version/12.02': {
         opera: true
       , version: '12.02'
+      , windows: true
       , a: true
       }
     , 'Opera/9.80 (X11; Linux i686; U; es-ES) Presto/2.8.131 Version/11.11': {
         opera: true
       , version: '11.11'
+      , linux: true
       , a: true
       }
     , 'Opera/9.80 (Macintosh; Intel Mac OS X 10.6.7; U; en) Presto/2.7.62 Version/11.01': {
         opera: true
       , version: '11.01'
+      , mac: true
       , a: true
       }
     , 'Opera/9.80 (Windows NT 5.2; U; zh-cn) Presto/2.6.30 Version/10.63': {
         opera: true
       , version: '10.63'
+      , windows: true
       , a: true
       }
     , 'Opera/9.80 (X11; Linux i686; U; it) Presto/2.5.24 Version/10.54': {
         opera: true
       , version: '10.54'
+      , linux: true
       , a: true
       }
     , 'Opera/9.70 (Linux ppc64 ; U; en) Presto/2.2.1': {
         opera: true
       , version: '9.70'
+      , linux: true
       , c: true
       }
     , 'Opera/9.63 (X11; Linux i686)': {
         opera: true
       , version: '9.63'
+      , linux: true
       , c: true
       }
     , 'Mozilla/5.0 (X11; Linux i686; U; en) Opera 8.52': {
         opera: true
       , version: '8.52'
+      , linux: true
       , c: true
       }
     }
@@ -258,6 +277,7 @@ module.exports.useragents = {
             yandexbrowser: true
             , webkit: true
             , version: '15.4'
+            , mac: true
             , a: true
         },
         'Mozilla/5.0 (Linux; Android 5.1.1; Nexus 5 Build/LMY48B) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2272.118 YaBrowser/15.4.2272.3608.00 Mobile Safari/537.36': {
@@ -274,42 +294,49 @@ module.exports.useragents = {
       'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_6_8) AppleWebKit/537.13+ (KHTML, like Gecko) Version/5.1.7 Safari/534.57.2': {
         safari: true
       , version: '5.1'
+      , mac: true
       , webkit: true
       , c: true
       }
     , 'Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_6_7; en-us) AppleWebKit/533.21.1 (KHTML, like Gecko) Version/5.0.5 Safari/533.21.1': {
         safari: true
       , version: '5.0'
+      , mac: true
       , webkit: true
       , c: true
       }
     , 'Mozilla/5.0 (Windows; U; Windows NT 5.1; ru-RU) AppleWebKit/533.18.1 (KHTML, like Gecko) Version/5.0.2 Safari/533.18.5': {
         safari: true
       , version: '5.0'
+      , windows: true
       , webkit: true
       , c: true
       }
     , 'Mozilla/5.0 (X11; U; Linux x86_64; en-us) AppleWebKit/531.2+ (KHTML, like Gecko) Version/5.0 Safari/531.2+': {
         safari: true
       , version: '5.0'
+      , linux: true
       , webkit: true
       , c: true
       }
     , 'Mozilla/5.0 (Windows; U; Windows NT 5.0; en-en) AppleWebKit/533.16 (KHTML, like Gecko) Version/4.1 Safari/533.16': {
         safari: true
       , version: '4.1'
+      , windows: true
       , webkit: true
       , c: true
       }
     , 'Mozilla/5.0 (Macintosh; U; PPC Mac OS X 10_6_1; en_GB, en_US) AppleWebKit/531.21.10 (KHTML, like Gecko) Version/4.0.4 Safari/531.21.10': {
         safari: true
       , version: '4.0'
+      , mac: true
       , webkit: true
       , c: true
       }
     , 'Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_5_7; de-de) AppleWebKit/525.28.3 (KHTML, like Gecko) Version/3.2.3 Safari/525.28.3': {
         safari: true
       , version: '3.2'
+      , mac: true
       , webkit: true
       , c: true
       }
@@ -318,61 +345,73 @@ module.exports.useragents = {
       'Mozilla/5.0 (Windows NT 6.3; Win64; x64; Trident/7.0; MAARJS; rv:11.0) like Gecko': {
         msie: true
       , version: '11.0'
+      , windows: true
       , a: true
       }
     , 'Mozilla/5.0 (Windows NT 6.3; WOW64; Trident/7.0; Touch; rv:11.0) like Gecko': {
         msie: true
       , version: '11.0'
+      , windows: true
       , a: true
       }
     , 'Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.2; Trident/6.0; ARM; Touch; WPDesktop)': {
         msie: true
       , version: '10.0'
+      , windows: true
       , a: true
       }
     , 'Mozilla/5.0 (Windows NT 6.3; WOW64; Trident/7.0; .NET4.0E; .NET4.0C; Media Center PC 6.0; rv:11.0) like Gecko': {
         msie: true
       , version: '11.0'
+      , windows: true
       , a: true
       }
     , 'Mozilla/5.0 (compatible; MSIE 10.6; Windows NT 6.1; Trident/5.0; InfoPath.2; SLCC1; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729; .NET CLR 2.0.50727) 3gpp-gba UNTRUSTED/1.0': {
         msie: true
       , version: '10.6'
+      , windows: true
       , a: true
       }
     , 'Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.1; Trident/4.0; InfoPath.2; SV1; .NET CLR 2.0.50727; WOW64)': {
         msie: true
       , version: '10.0'
+      , windows: true
       , a: true
       }
     , 'Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Win64; x64; Trident/5.0; .NET CLR 3.5.30729; .NET CLR 3.0.30729; .NET CLR 2.0.50727; Media Center PC 6.0)': {
         msie: true
       , version: '9.0'
+      , windows: true
       , c: true
       }
     , 'Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; Trident/5.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C)': {
         msie: true
       , version: '8.0'
+      , windows: true
       , c: true
       }
     , 'Mozilla/4.0 (compatible; MSIE 7.0b; Windows NT 5.1; .NET CLR 1.1.4322; InfoPath.1; .NET CLR 2.0.50727)': {
         msie: true
       , version: '7.0'
+      , windows: true
       , c: true
       }
     , 'Mozilla/4.0 (compatible; MSIE 6.1; Windows XP; .NET CLR 1.1.4322; .NET CLR 2.0.50727)': {
         msie: true
       , version: '6.1'
+      , windows: true
       , c: true
       }
     , 'Mozilla/4.0 (Compatible; Windows NT 5.1; MSIE 6.0) (compatible; MSIE 6.0; Windows NT 5.1; .NET CLR 1.1.4322; .NET CLR 2.0.50727)': {
         msie: true
       , version: '6.0'
+      , windows: true
       , c: true
       }
     , 'Mozilla/4.0 (compatible; MSIE 5.01; Windows NT)': {
         msie: true
       , version: '5.01'
+      , windows: true
       , c: true
       }
     }
@@ -380,6 +419,7 @@ module.exports.useragents = {
       'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/39.0.2171.71 Safari/537.36 Edge/12.0': {
         msedge: true
       , version: '12.0'
+      , windows: true
       , a: true
       }
     }
@@ -428,78 +468,91 @@ module.exports.useragents = {
         gecko: true
       , firefox: true
       , version: '25.0'
+      , windows: true
       , a: true
       }
     , 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10.8; rv:24.0) Gecko/20100101 Firefox/24.0': {
         gecko: true
       , firefox: true
       , version: '24.0'
+      , mac: true
       , a: true
       }
     , 'Mozilla/5.0 (X11; Linux i686; rv:21.0) Gecko/20100101 Firefox/21.0': {
         gecko: true
       , firefox: true
       , version: '21.0'
+      , linux: true
       , a: true
       }
     , 'Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20121202 Firefox/17.0 Iceweasel/17.0.1': {
         gecko: true
       , firefox: true
       , version: '17.0'
+      , linux: true
       , c: true
       }
     , 'Mozilla/5.0 (X11; Linux x86_64; rv:15.0) Gecko/20120724 Debian Iceweasel/15.0': {
         gecko: true
       , firefox: true
       , version: '15.0'
+      , linux: true
       , c: true
       }
     , 'Mozilla/5.0 (Windows NT 6.2; WOW64; rv:15.0) Gecko/20120910144328 Firefox/15.0.2': {
         gecko: true
       , firefox: true
       , version: '15.0'
+      , windows: true
       , c: true
       }
     , 'Mozilla/5.0 (Windows; U; Windows NT 6.1; WOW64; en-US; rv:2.0.4) Gecko/20120718 AskTbAVR-IDW/3.12.5.17700 Firefox/14.0.1': {
         gecko: true
       , firefox: true
       , version: '14.0'
+      , windows: true
       , c: true
       }
     , 'Mozilla/5.0 (Windows NT 5.1; rv:6.0) Gecko/20100101 Firefox/6.0 FirePHP/0.6': {
         gecko: true
       , firefox: true
       , version: '6.0'
+      , windows: true
       , c: true
       }
     , 'Mozilla/5.0 (X11; Linux x86_64; rv:2.2a1pre) Gecko/20100101 Firefox/4.2a1pre': {
         gecko: true
       , firefox: true
       , version: '4.2'
+      , linux: true
       , c: true
       }
     , 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:2.0) Gecko/20100101 Firefox/4.0': {
         gecko: true
       , firefox: true
       , version: '4.0'
+      , mac: true
       , c: true
       }
     , 'Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.2b1) Gecko/20091014 Firefox/3.6b1 GTB5': {
         gecko: true
       , firefox: true
       , version: '3.6'
+      , windows: true
       , c: true
       }
     , 'Mozilla/5.0 (Windows; U; Windows NT 6.0; de; rv:1.9.0.15) Gecko/2009101601 Firefox 2.1 (.NET CLR 3.5.30729)': {
         gecko: true
       , firefox: true
       , version: '2.1'
+      , windows: true
       , c: true
       }
     , 'Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8.0.7) Gecko/20061014 Firefox/1.5.0.7': {
         gecko: true
       , firefox: true
       , version: '1.5'
+      , linux: true
       , c: true
       }
     }
@@ -508,18 +561,21 @@ module.exports.useragents = {
         gecko: true
       , seamonkey: true
       , version: '2.7'
+      , windows: true
       , x: true
       }
     , 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10.5; rv:10.0.1) Gecko/20100101 Firefox/10.0.1 SeaMonkey/2.7.1': {
         gecko: true
       , seamonkey: true
       , version: '2.7'
+      , mac: true
       , x: true
       }
     , 'Mozilla/5.0 (X11; Linux i686; rv:10.0.1) Gecko/20100101 Firefox/10.0.1 SeaMonkey/2.7.1': {
         gecko: true
       , seamonkey: true
       , version: '2.7'
+      , linux: true
       , x: true
       }
     }
@@ -961,6 +1017,7 @@ module.exports.useragents = {
         phantom: true
       , webkit: true
       , version: '1.5'
+      , mac: true
       , x: true
       }
     }