Abstract: A security system for not enabling, enabling or disabling electrical devices for deterring theft, or preventing unauthorized use of such devices. The security system comprises a plurality of electrical devices which are operationally linked via a bi-directional communication medium, which may be via a mains power supply or a microwave or radiowave medium. Programmable means are provided for controlling operation of the operative parts of the electrical devices. The programmable means may have a signal transmitting and receiving means associated with it for transmitting and receiving control signals over the communication medium.

Abstract: A combined bund and pallet for supporting a container during transport or storage and having a base and an integral side wall upstanding from that base and surrounding a material collection space. A support such as an open grid is provided within the area surrounded by the side wall so as to provide a support for the container and hold it above the base. A relatively clear collection space is thereby provided between the base and the bottom of the container. In some embodiments, anti-surge baffles may intrude into that space.