Macintosh Numeric Keypad

歴史的背景

Like the Apple IIe before it, the Macintosh provided an optional external keypad which also included arrow keys that daisy chained to the computer via the telephone-cord connectors. Though introduced with the Macintosh in January 1984, Apple did not ship it until September 1984 at a retail price of $99 U.S. The M0120P version of the numeric keypad, compared to M0120, uses symbols on the Clear and Enter keys, instead of text.