This was the last version of the Apple II series that was first released in April 1977 and finally discontinued in mid 1993, making it the only home computer in production for more than 15 years.
The major difference from the previous Apple IIe versions is that the keyboard had been redesigned to be functionally equivalent to the keyboard of the Apple IIGS. The new keyboard incorporated an 18-key numeric keypad including two programmable function keys and cursor control keys.
The Platinum also had a new light-grey coloured case, a new motherboard design with a reduced chip count, and included a revised owner's manual, a guide to AppleSoft BASIC and two double-sided training disks.
Finally, the IIe was shipped with the Apple 64 KB / 80-column upgrade card already installed.
APPLE IIe Platinum
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81 keys with numeric keypad and arrow keys
MMU and IOU custom chips
40 or 80 columns x 24 lines
40 x 40-48 (16 col), 280 x 160-192 (6 col), 560 x 160-192 (2 col)