Learn in the textbookFundamental Concepts of IoT and Embedded Systems
DefinitionAn embedded system (組込みシステム) is a dedicated computer system built into a device so that it does only its fixed job.
ExplanationAn embedded system repeats fixed processing with parts and software chosen to fit its device. At its center is a microcomputer, which packs the circuits for computation, memory and input/output into one small unit.
AnalogyLess a chef who can cook anything, more the person minding a bread machine who bakes the same loaf the same way every day.
Memory hookEmbedded means set deep inside: picture a computer buried in the device where no one can see it from outside.