レベル 3：歴史の文章
歴史についての長文です。年号や固有名詞も正確に。
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The history of the keyboard begins long before the computer. In the 1870s, the first commercially successful typewriters arranged their keys in a layout that would later become known as QWERTY, named after the first six letters on the top row. Although many alternative layouts have been proposed since then, including some designed to reduce finger movement, QWERTY has remained the standard for more than 140 years. One reason is simple habit: millions of people have already learned it, and changing would be costly. Today, the same arrangement appears on laptops, tablets and even phone screens. Whether you type reports, code or messages to friends, the skills you build here will travel with you to almost every device you use.