Abstract: A security cabinet for protecting components of a microcomputer at a work station. The security cabinet includes a hollow housing having an open front permitting access to the interior of the housing, a shelf slidably mounted within the housing, a door pivotally mounted on the housing between an open position permitting sliding movement of the shelf and a closed position enclosing a portion of the open front to prevent movement of the shelf and removal of components from the housing, and a lock on the door for locking the door in its closed position to the shelf. The shelf accommodates single or dual disc drives and when slid into the housing defines a storage space behind the disc drives and prevents the removal of a cooling fan from the computer. A monitor may be fastened to the top of the housing, and the door may be opened without removing the monitor.