an instrument or device used for observing, checking, or keeping a continuous record of a process or quantity
A computer case also known as a computer chassis, tower, system unit, cabinet, base unit or simply case and sometimes incorrectly referred to as the "CPU" or "hard drive", is the enclosure that contains most of the components of a computer (usually excluding the display, keyboard and mouse).
a panel of keys that operate a computer or typewriter.
A hand-held input device that is moved about on a flat surface to direct the cursor on a computer screen. It also has buttons for activating computer functions.
pair of earphones typically joined by a band placed over the head, for listening to audio signals such as music or speech.