An information processing apparatus includes: a casing which includes a side plate on each of left and right sides; and a processing apparatus to be mounted in the casing, wherein the processing apparatus includes: a board on which an arithmetic processing device and a storage device are mounted; a rail which is provided on each of the left and right sides of the board and extends in the horizontal direction to make the board slidable; a locking portion which locks the board to the casing; and a detection portion which detects that the board is taken out when the board is taken out from the casing by that locking by the locking portion is released and the board slides against the rails.

A printed circuit board (PCB) having an improved waterproof structure for preventing corrosion of a substrate is disclosed. A plurality of screen-printed protrusions is provided at the PCB surface. The plurality of protrusions allow water to be formed in waterdrops so that the waterdrops can flow to the outside of the PCB. The PCB is arranged to have a tilted structure for facilitating discharge of the water. The tilted structure discharges waterdrops to a lower side of the PCB. The PCB and a PCB assembly having the same are applicable to electronic appliances such as a washing machine.

A printed circuit board (PCB) having an improved waterproof structure for preventing corrosion of a substrate is disclosed. A plurality of screen-printed protrusions is provided at the PCB surface. The plurality of protrusions allow water to be formed in waterdrops so that the waterdrops can flow to the outside of the PCB. The PCB is arranged to have a tilted structure for facilitating discharge of the water. The tilted structure discharges waterdrops to a lower side of the PCB. The PCB and a PCB assembly having the same are applicable to electronic appliances such as a washing machine.

An electrooptical display device comprising an electrooptical display and a plurality of foils which are arranged on one of another and the plurality of foils is situated in front of the electrooptical display, so that the plurality of foils is situated between the electrooptical display and a possible viewer or observer of the electrooptical display device is disclosed. The foils comprise centering features for centering the foils in a frame of the electrooptical display device and the foils are connected by a linking.

An electrooptical display device comprising an electrooptical display and a plurality of foils which are arranged on one of another and the plurality of foils is situated in front of the electrooptical display, so that the plurality of foils is situated between the electrooptical display and a possible viewer or observer of the electrooptical display device is disclosed. The foils comprise centering features for centering the foils in a frame of the electrooptical display device and the foils are connected by a linking.