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The company said IE9 offers "performance improvements" and a safer browsing experience, made possible in part by drawing on capabilities from Windows 7. The newest IE does not support Windows XP, which some surveys estimate is still the OS version on more than 60 percent of all Windows machines. It does offer extensive support for HTML5, Scalable Vector Graphics, Cascading Style Sheets Level 3, ECMAScript 5, and DOM.

Letting Web sites 'Shine'

Microsoft said it "reimagined the role of the browser" by "rethinking the concept of fast." It said Windows 7 offers fully hardware-accelerated graphics, text, video and audio, resulting in experiences that are "as fast and responsive as native applications installed on your computer." The recently optimized JavaScript engine, Chakra, is utilized to take advantage of multiple CPU cores.

The company said it also rethought how people interact with sites and web applications, so IE9 provides a "clean look" to let web sites "shine." Microsoft said this is due to a,15105,97242,76936,66303,12661,55133,99925,17883,83222,94204,16023,59425,34917,70694,23232,66758,83205,72574,66263,26110,56515,92271,45494,37728,18611,26600,52143,95157,69146,95766,70639,10633,73046,69865,77751,12361,84024,13870,59889,73321,91678,87341,42006,65075,79484,79823,47012,38344,94936,58401,69500,66686,57399,66578,44209,93592,45308,47866,70216,92987,61341,36147,29717,57996,55460,71783,21865,64451,24690,77670,60029,86721,28598,95773,98096,61491,36881,98054,21471,87432,54672,15803,47913,49213,29159,40921,31677,26884,24741,95529,92271,16942,89043,29272,62178,65060,25055,37501,23561,54248,43972,63138,30767,30315,15284,53822,63721,94531,84601,29139,33092,77056,31164,40584,36345,71279,74831,91368,29905,27063,21834,47062,24443,14106,75541,66824,95778,98325,79570,17650,88865,33300,99793,19835,53786,84715,85558,10238,89202,15327,50651,86476,65750,45051,61307,97815,89735,36110,74585,93729,12188,59533,97190,90876,77968,40167,52830,45460,79938,35205,43208,77416,16158,99641,25773,86381,39380,11996,83144,49362,42392,48411,53610,25697,35929,52194,40102,53587,67151,28214,62735,63014,35907,36802,60403,46133,35403,75248,11282,76273,58403,22534,38106,30052,11726,72503,16002,18313,70492,76107,75728,82822,58479,58397,21787,71247,19345,83943,37060,62515,58579,80743,76110,34313,33617,59837,73357,73137,80743,18754,40928,16900,37240,91698,71206,78493,40997,70943,72135,83691,42723,60536,77835,24115,71976,34204,27797,90165,46595,85236,50979,62402,91354,17059,84742,54385,13806,29824,81359,82692,80261,23458,47757,99171,55073,18913,60315,14006,33241,24321,60497,47041,62094,82512,39412,86906,74662,81677,51410,82895,70344,68768,65670,54220,93144,28259,95589,96444,23582,71823,43166,10562,48941,56966,84861,84529,21478,11809,22512,74955,20784,38497,17760,29021,84815,52569,86177,38238,83289,76478,75810,27291,10334,97952,17457,75141,97420,16637,72239,50408,18005,45454,77473,96693,37258,38149,65295,23947,79552,40807,83955,51508,72281,58338,80470,89825,56182,38231,18432,95485,82387,18665,20141,23249,50130,54817,35474,22647,37905,53886,69432,57593,15722,97323,98292,60214,21584,67297,40235,22369,28672,30924,80403,12344,38982,34154,54904,52994,29274,35292,14678,34915,20614,26248,66135,68395,80703,46250,34446,60717,31589,31387,82921,92903,76250,84943,80843,75280,59351,55660,67405,56103,67855,44526,51650,31743,32184,93913,71274,43123,61258,88811,96324,37081,44772,11457,97544,50916,91447,85559,83831,53368,92182,24011,36129,51815,30100,91704,88942,83765,72219,86217,97924,58452,62882,36477,21375,86359,89460,41226,40077,41237,37654,52872,68970,29267,74706,40688,10361,55909,79659,68495,55403,41816,98828,41007,43045,61569,43010,72198,47608,21257,40947,32542,30086,54767,45086,53457,83197,84695,97133,28181,74527,81270,84388,90430,61903,31013,48676,56735,29432,23606,63819,96505,50833,15026,28240,90958,53663,47954,38511,12390,48116,20722,94830,94255,31901,38230,34613,51846,34733,55384,72510,59174,12044,13335,96243,74896,36586,72148,19835,90864,99753,55771,94671,53542,33977,71181,80848,55128