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在人類的歷史中，我們的科技都建基於

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大腦、火、及武器

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火和武器都演變成發電廠和核武

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最大的轉變卻發生在我們的大腦

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自60年代起，電腦的運算能力以指數倍升

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令電腦體積更少，效率更高

0:00:22.524,0:00:25.444
正因電腦部件縮小到接近原子的大小

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物理層面的障礙便不能忽視

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到底是甚麼障礙？我們先從基本的說起

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電腦是由靠執行簡單運算的部件構成

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用以儲存、執行和顯示資訊，並由相關元件操控

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電腦晶片由模組構成

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模組由邏輯閘構成，邏輯閘由電晶體構成

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電晶體是最基本的處理元件

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簡單來說，它就是一個按紐

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去阻截或容許資訊流通

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資訊的基本單位是位元，以0和1來表示

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不同數量的位元可以反映資訊的複雜程度

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把電晶體組合便構成邏輯閘去進行最基本的運算

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以AND閘為例，當兩個輸入值都是1的時候才會輸出1

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其他情況都是輸出0

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不同組合的邏輯閘構成有意義的模組

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例如加法的模組

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當你能做加法，就等於能做乘法。而當你能做乘法

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基本上甚麼也可以做

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因為所有運算都離不開一年級生的數學

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你可把電腦想像成一群正在

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回答簡單數學問題的七歲小學生

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只要數量足夠，不論是天文物理學還是電腦遊戲，都能夠計算出來

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