Abstract: A mounting rack for aircraft has one or more rows, which are located one above the other, each having one or more compartments which are located alongside one another, for holding electronics units, with a compartment being designed for independent insertion and withdrawal of an electronics unit. The compartment in each case is associated with a first electrical plug connector, such that the first plug connector can interact with the corresponding second plug connector of an electronics unit solely as a result of the insertion of the electronics unit into the compartment.

Abstract: A safety detachable back panel mounted on the back surface of a server is disclosed, which comprises a panel body having two plain holes, retaining mechanisms adapted to secure the panel body to heat radiation vents in the back surface of the server, two second screw-mounting holes respectively aligned between the plain holes and two first screw-mounting holes in the back surface of the server, and a lock unit having a swivel sheet capable of being turned by a key, wherein the swivel hook blocks the passages between the plain holes and the second screw-mounting holes, so the screws mounted on the second screw-mounting holes cannot be unauthorizedly accessed by a tool. As a result, the safety detachable back panel can protect the internal storage data and the connectors of the external data transmission devices.