This document discusses computer casing and hardware. It defines computer casing as the box-like case that contains a computer's electronic components. It describes the main types of casings as desktop, mini tower, mid-size tower, and full-size tower. Each type is defined and their advantages/disadvantages listed. The parts of a computer case are identified as the front panel, back panel, and internal parts. Three factors that influence computer case design are identified as ergonomics, expansion capabilities, and cooling.