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1 1 84.4% 8 8 1 43.6% 2 1 1 1 8 (85.4%) 57.3% 9 (90.3%) 2 54.8% All Rights Reserved, Copyright 2003 4

84.3% 1 40.3% 30.9% 9.1% 4.8% HTML 64.4%HTML 35.6% HTML HTML (81.9%) (78.5%) (67.0%) (56.6%) All Rights Reserved, Copyright 2003 5

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OutlookExpress 65.2% Yahoo! (8.7%)Outlook(8.2%) 1 23 1.7 Yahoo! 1.8 3.5 56.4% 4 1 25.9% 14.6% All Rights Reserved, Copyright 2003 7

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2001 2 2003 HTML CM A4 10 2002 3 3-4 4 All Rights Reserved, Copyright 2003 9

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2 5 11 3.1 12 3.2 15 3.3 39 3.4 45 49 53 59 5.1 60 5.2 No.1 62 5.3 65 5.4 69 5.5 72 5.6 76 5.7 80 5.8 83 5.9 86 91 6.1 92 6.2 98 6.3 100 6.4 106 6.5 110 6.6 112 115 121 8.1 122 8.2 123 8.3 124 8.4 146 8.5 264 8.6 316 All Rights Reserved, Copyright 2003 15

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