抽象機器(英語:Abstract machine),又稱抽象電腦abstract computer),利用自動機理論,建立出電腦硬體或軟體的理論模型。把運算過程抽象化,一般來說是採用離散時間模型,可應用於電腦科學電腦工程。在計算理論中,抽象機器經常被當成是一種思想實驗,用來推論可計算性computability),或是分析演算法時間複雜度空間複雜度

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