A crab is any of various crustaceans with four pairs of legs, a pair of pincers, a flattish shell, and a short, broad abdomen folded under its thorax. Several similar animals, such as the crab louse, or the hermit crab[?], are also called crabs.
A crab is any of various machines used to hoist heavy objects.
... Federal, non-US). Most would include in all computer systems obligatory mechanisms controlling use in ways deemed by copyright holders to be unacceptable. See Professor ...