General-purpose microprocessors are also used in embedded systems, but generally require more support circuitry than microcontrollers.

Ready-made computer boards

PC/104 and PC/104+ are examples of standards for ready-made computer boards intended for small, low-volume embedded and ruggedized systems. These are mostly x86-based and often physically small compared to a standard PC, although still large compared to most simple (8/16-bit) embedded systems. They may use a standard operating system

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