Abstract: A computer and peripheral apparatus arrangement is disclosed to include a computer device having a mainframe and a display screen supported on the mainframe, peripheral apparatus, and a connection structure for fastening the peripheral apparatus to one lateral side of the display screen and electrically connecting the peripheral apparatus to the mainframe of the computer device. The connection structure includes a first connection interface having a male (or female) electric connector and male (or female) fastening members and provided at one lateral side of the display screen, and a second connection interface having a female (or male) electric connector and female (or male) fastening members for connection to the male (or female) electric connector and male (or female) fastening members of the first connection interface.

Abstract: A detachable fan assembly, which includes a casing, which has an opening and angled lugs at two sides of the opening, a mounting frame, which has hooked portions respectively detachably hooked on the angled lugs of the casing, a fan fastened to the mounting frame with fastening members, and a grille, which is covered on the opening of the casing to hold down the mounting frame on the angled lugs of the casing and which has a locating flange at one lateral side and a plurality of protruding retaining portions disposed at the other lateral side and respectively fastened to the casing at two sides of the opening and a finger strip for the pulling of the hand to separate the grille from the casing.

Abstract: An anti-escape socket and plug arrangement used in a POS (Point of Sales) system is disclosed to include an anti-escape socket, which has a face panel, an insertion hole and multiple screw holes in the face panel, a base panel, a socket body at the base panel corresponding to the insertion hole, and a retaining block at the socket body, and an anti-escape plug, which has a plug body positioned in the insertion hole of the face panel and connected to the socket body, a hook, which is provided at the plug body and hooked on the retaining block to lock the anti-escape plug to the anti-escape socket, and tie screws respectively threaded into the screw holes to enhance the connection between the anti-escape plug and the anti-escape socket.