Abstract: A carrier for an electronic device comprises a hollow casing (14) for accomodating the electronic device, which casing is configured for sliding insertion into and out of a rack. A latch (46) at the rear of the casing releasably retains the casing in the rack, and an actuating rod (52) extends from the front of the casing to the latch to operate the latter. A lock (104) on the front (16) of the carrier releasably locks the actuating rod (52) in the latched position of the latch (46) to prevent unauthorised withdrawal of the carrier from the rack.