An enclosure for housing various components of a computing device is provided herein, which contains at least three L-shaped corner members, at least three elongated wall members, a top cover member, and a bottom cover member. The corner members and the wall members are interleaved and joined to form a polygonal circumference for the enclosure. The top and bottom cover members are fixed to the top and bottom of the circumference respectively into a closed, polygonal-shaped enclosure so that a component of the computing device such as the motherboard, optical disk drive, hard disk drive, etc., could be housed therewithin.