A computing system comprising: a control unit ; a receptacle electrically coupled to the control unit ; a lock port to receive a cable-lock unit to lock the computing system at a location; a lock engagement member ; and a plug coupled to the lock engagement member , wherein the lock engagement member and the plug are to translate and form an electrical connection between the plug and the receptacle in response to receiving the cable-lock unit in the lock port , and wherein the lock engagement member and the plug are to translate and break the electrical connection between the plug and the receptacle in response to removing the cable-lock unit from the lock port , and wherein the control unit is to determine absence of the cable-lock unit in the lock port in response to break in the electrical connection between the plug and the receptacle ; and wherein the control unit is to: determine presence of the cable-lock unit in the lock port in response to formation of the electrical connection between the plug and the receptacle ; operate the computing system in a secure mode in response determining the presence of the cable-lock unit in the lock port ; and operate the computing system in a second mode in response to determining the absence of the cable-lock unit in the lock port . a control unit ; a receptacle electrically coupled to the control unit ; a lock port to receive a cable-lock unit to lock the computing system at a location; a lock engagement member ; and a plug coupled to the lock engagement member , wherein the lock engagement member and the plug are to translate and form an electrical connection between the plug and the receptacle in response to receiving the cable-lock unit in the lock port , and wherein the lock engagement member and the plug are to translate and break the electrical connection between the plug and the receptacle in response to removing the cable-lock unit from the lock port , and wherein the control unit is to determine absence of the cable-lock unit in the lock port in response to break in the electrical connection between the plug and the receptacle ; and the lock engagement member and the plug are to translate and form an electrical connection between the plug and the receptacle in response to receiving the cable-lock unit in the lock port , and wherein the lock engagement member and the plug are to translate and break the electrical connection between the plug and the receptacle in response to removing the cable-lock unit from the lock port , and wherein the control unit is to determine absence of the cable-lock unit in the lock port in response to break in the electrical connection between the plug and the receptacle ; and wherein the control unit is to: determine presence of the cable-lock unit in the lock port in response to formation of the electrical connection between the plug and the receptacle ; operate the computing system in a secure mode in response determining the presence of the cable-lock unit in the lock port ; and operate the computing system in a second mode in response to determining the absence of the cable-lock unit in the lock port . determine presence of the cable-lock unit in the lock port in response to formation of the electrical connection between the plug and the receptacle ; operate the computing system in a secure mode in response determining the presence of the cable-lock unit in the lock port ; and operate the computing system in a second mode in response to determining the absence of the cable-lock unit in the lock port . <EOS>