System-on-a-chip或system on chip (SoC或SOC)是一種將電腦或電子系統的全部零部件併入一顆IC(晶片)的想法。一顆IC上可能就包含數位，類比，及混合信號並有radio-frequency功能。主要應用在嵌入式系統的領域。
如果建構SoC在某應用領域上不可行，另一選擇是SiP (system in package)，即包括多種晶片於單一封包中。 不過，一般相信SoC較具成本效益，它能增加產量，並且包裝也不像SiP那麼錯綜複雜。
If it is not feasible to construct an SoC for a particular application, an alternative is a system in package (SiP) comprising a number of chips in a single package. However, SoC is believed to be more cost effective since it increases the yield of the fabrication and also its packaging is less complicated compared to a SiP.
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