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A Printed Circuit Board (PCB) is a foundational component in modern electronics, providing a platform to mechanically support and electrically connect electronic components. It consists of insulating substrate material, typically fiberglass, laminated with conductive copper traces that form circuits. Components like resistors, capacitors, and integrated circuits are soldered onto the board to create functional electronic devices. PCBs come in various types, including single-layer, double-layer, and multi-layer designs, catering to different complexity levels. They are essential in industries such as consumer electronics, automotive, aerospace, and medical devices due to their reliability, compactness, and efficiency. PCBs enable the miniaturization and advancement of technology.