The shoulder width key positions and contoured key wells help to release shoulder tension and make typing easier on the fingers.

From Kinesis

Advantage USB (basic programmable) models

The Advantage USB contoured keyboard sets a new standard for ergonomic keyboards. The Advantage line incorporates the same advanced ergonomic design as our other contoured keyboards and delivers additional features not found on other USB keyboards.

Features

• Advanced ergonomics PLUS on-board programmability
• Compatible with both PC and Mac operating systems.
• Instant configuration for Windows, Mac and non-Windows PC operating environments, includes Windows and Mac legended keys.
• Integrated two-port USB hub
  
• USB devices can be hot-plugged safely
• Select 24, 36, or 48 macros (56, 38, or 28 characters long, respectively)
• Supports New triple action foot switch.

Pro Features

• Double memory for longer macros (24 macros yields 142 characters, 36 macros yields 94, and 48 macros yields 70)
• Memory locking switch protects users or managers against accidental or unauthorized programming of the keyboard
• Glossy metallic finish

Compatibility

• Available USB port
• Windows 98 or higher
• Mac OS 8.6 and higher
• No special drivers required