Abstract: An assembly of a notebook computer and a docking station includes a locking apparatus for locking the computer on the station. The apparatus includes a front retaining unit attached to the station and engaged within a front recess unit in the front end portion of the computer, and a rear retaining unit attached to the station and engaged within a rear recess unit in the rear end portion of the computer. In this situation, the computer is coupled completely with a connector unit on the station. Because the front and rear end portions of the computer are locked on the station by means of the retaining units which constitute a double lock, the computer cannot be removed forcibly from the station without disengaging the retaining units from the recess units.