The IBM Retail POS Keyboard /w Card Reader and Display was one of five Model M POS input devices introduced with the IBM 4694 POS Terminal in June 1993. The Model M8 is essentially an enlarged Model M7 keypad with an added LCD tilt-adjustable LCD panel in the top-left corner and no option to have it without a magnetic stripe reader. In its default layout, the keypad has 50 keys of which 49 are usable, and the middle bank has a numeric keypad made up of single-unit keys with the zero key taking up two switches. The single key on its own serves as a dedicated Ctrl key. The other slightly larger keys are designed to be programmable and thus have transparent keytops.