1994: Microsoft Natural Keyboard
The early 90s were the PC's heyday, but this was also the time when fears of carpal tunnel syndrome and other keyboard-related maladies began to surface. Enter the Microsoft Natural Keyboard, an affordable ergonomic peripheral to combat those wrist-mangling models that came with OEM machines. The position of the keys, split down the center and tilted upward, ostensibly prevented carpel tunnel and helped correct a user's posture. Microsoft's first ergo keyboard became a widespread sensation, and led to upgraded iterations in 1998, 1999 and, most recently, 2005 with the Natural Ergonomic Keyboard 4000, which is still available today.