Abstract: An all purpose electronic enclosure of electrically nonconductive material that adapts to various configurations and uses with a minimum of parts. A unitary receptacle portion has internal grooves to receive printed circuit boards, dividers and the like. One end of the receptacle portion is open. An optional cover closes the open end. Different cover constructions facilitate electrical connectors and mounting arrangements. External tracks on one or more sides of the enclosure receive plate-like members such as mounting plates, heat sinks, terminal block mountings and the like.