Virtually every electronic device must connect to an electronic system by means of an electromechanical structure called a package. This electronic component package concept has been in use for more than a century, and electronics would not exist without it. Electronics can be divided into a simple hierarchy consisting of packages, devices, printed circuit boards (PCBs), and a system. The package is the interface between an electronic device (e.g., computer chip) and a PCB which typically supports a group of packaged active and passive electronics.
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