Computer case - online puzzles

A computer case, also known as a computer chassis, tower, system unit, cabinet, or base unit, is the enclosure that contains most of the components of a computer (usually excluding the display, keyboard and mouse ).

Cases are usually constructed from steel (often SECC— steel, electrogalvanized, cold -rolled, coil) or aluminium. Plastic is sometimes used, and other materials such as glass, wood and even Lego bricks have appeared in home-built cases.