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| Apple Extended Keyboard | |
|---|---|
 Apple Extended Keyboard II | |
| Model no. | M0115 (original); M3501 (II) |
| Manufacturer | Apple Computer |
| Product family | Apple Keyboard |
| Keyswitches | Alps Electric |
| Interface | Apple Desktop Bus |
| Introduced | March 2, 1987 (original) October 15, 1990 (Extended Keyboard II) |
| Discontinued | October 15, 1990 (original) March 14, 1994 (Extended Keyboard II) |
| Price | US$163 |
The Apple Extended Keyboard (AEK, model M0115) is a computer keyboard that was first sold separately alongside the Macintosh II and SE starting in 1987. It was replaced in 1990 by the Apple Extended Keyboard II (AEKII, model M3501) which was pre-packaged with Apple Professional Desktops starting with the Macintosh IIsi.
Both versions were very similar, differing primarily with the addition of adjustable height legs in the AEKII and other minor changes. Both used Apple Desktop Bus (ADB) to connect to the host computer, with ports on either side to allow daisy chaining of another input device, typically a computer mouse or trackball.
In 1994, Apple would begin shipping the AppleDesign Keyboard (M2980) which featured only one ADB port and which used rubber dome switches rather than Alps Electric switches.