File:FingerWorks TouchStream Stealth keyboard and manual.jpg

Summary
The FingerWorks TouchStream ST "Stealth" (similar to TouchStream LP), an ergonomic keyboard using gesture recognition features. Discontinued when Apple acquired FingerWorks in 2005. It has since been reported that its underlying multi-touch features were a major influence on the iPhone.

Source

 * File:Fingerworks Touchstream Keyboard.jpg by Blythwood, Wikimedia Commons. 2020-06-29.