Abstract: A small-size electronic apparatus includes a plurality of units each having a circuit board and an independent housing accommodating various functional components on a function to function basis. Desired ones of the units can be interconnected by a connector or connectors which may be in the form of a cable having a connector elements at its two ends with which interface portions of the units are inter-connected, or a connector pair having a male connector element and a female connector element which permit direct interconnection for the units to be layered one on top of another. The connectors permits the removal or assembling of the units without requiring any tools, and the provision of additional units with no limitation being imposed on the number of units.

Abstract: A product terminal incorporated in a product sends using state information for each configuring unit in real time to the host computer. The host computer estimates QCD of collected product considering possibility of reuse of each unit of the product, and shares the information with a warehouse center terminal, a factory terminal, and a collection terminal to effectively produce products.

Abstract: In a compact, electronic apparatus, a plurality of units are provided. Each of the units has a single function and has a functional component secured to a cabinet.

Abstract: A large scale LCD device has a plurality of LCD modules coupled together to form a single screen of the LCD panel. Each module has a plurality of top holes, bottom protrusions, left protrusions and right holes on respective sides of the module. The top hole has a longitudinal section and a transverse section for guiding the bottom protrusion in a horizontal direction for locking the bottom protrusion with the top hole. In the movement of the module for guiding the protrusion for locking operation, the left protrusions advance to the right holes to be received therein and locked with locking pins.