Macintosh Quadra/Centris 610 power button (Score 1)

The Macintosh Quadra/Centris 610 power button is located on the front of the unit below the floppy disk drive, where a non-Mac user would expect to find the eject button. To add insult to injury, it was a hard power button, which shut down the computer abruptly when pressed.

Picture of Quadra 610