| http://www.w3.org/ns/prov#value | - The portable computer system of claim 9, further comprising a locking mechanism including a hook and a release button formed on said cover and a conforming groove formed on said main body, for locking said cover to said main body as said hook is received within said groove while said cover is in said closed position, and for unlocking said cover from said main body by depressing said release butto
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