Abstract: A sliding track assembly for a casing for installing an embedding object so that the embedding object can be pulled out or pushed thereto comprises a retaining unit having a front end and a rear end; each of the front end and the rear end having a plurality of through holes for locking the retaining unit to a casing; a base having a wall with a plurality of through holes; a sliding sleeve engaged to and slideable to the base; the sliding sleeve having a long hole; a supporting frame installed at an inner side of the sliding sleeve and having an ear; the ear having a plurality of retaining holes and a sliding groove corresponding to the long hole of the sliding sleeve; and a clamping unit installed at an outer side of the sliding sleeve.

Abstract: A modularized electronic switching controller assembly for a computer includes a computer device; a hub positioned at a rear end of the computer device; two sides of the hub unit being installed with tracks which are retained in a machine frame; the machine frame being formed by four supporting posts; a support arm connected between the computer-related assembly and the hub for receiving conductive wires; a switching controller installed at the tracks having two racks of the hub unit; a connecting surface of the switching controller having an electric connector; a rear side of the switching controller being installed with at least one connecting port; moving the switching controller through the tracks will make the switching controller entering from a rear end of the machine case; by the connection of the electric connector and the hub unit, the connecting port can be connected to external peripherals or a server.

Abstract: A positioning assembly between a computer-related assembly and a hub at a rear side of the computer-related assembly has a support arm connected between the computer-related assembly and the hub for receiving conductive wires; a positioning device at one surface of the computer-related assembly for combining the hub; two sliding tracks at two opposite lateral side of the computer-related assembly; the sliding track and sliding track being supported by four supporting posts which are formed as a supporting frame; the computer-related assembly being movable along the tracks from an outer side to an inner side; by the positioning device, the computer-related assembly being combinable with the hub. If an external force is applied to the computer-related assembly, the positioning device will release from the computer-related assembly.