The speed in baud is the number of discrete conditions or events per second. Eight-bit bytes are most common. As a separate component, a cash drawer is operated and electronically opened by a printer or directly from a computer. A memory device used in hand held bar code reader. CCD scanners use a light technology to read bar codes.
Color monitors vary in the number of colors, dot-pitch and intensities they can produce.
Credit card authorization is normally accomplished by reading a credit cared through a credit card reader that is integrated into a register or stand-alone reading device. A credit card reader is either integrated into a register, attached onto a register as a separate component or is part of a stand-alone terminal dedicated for the sole function of processing credit card transactions. This information normally consists of a description and price of the product they are purchasing. Customer pole displays are also used to display marketing information and other messages. The label rolls are coated with a thermo-sensitive layer that darkens when exposed to intense heat.