For instance, you can perform a keyboard or mouse function, launch a program, switch profiles or even tweak settings on another connected Razer product (like a standalone gaming mouse).

ENGADGET: Razer Blade review (late 2012)

The couple were struck by the need for such a product when Miri observed the problems her professor at Pratt (who has a hook replacement for a missing forearm) had while trying to use an animation program with many different menus, which required shifting between the keyboard and the mouse.

FORBES: The Importance of 'Pivoting'

Emotiv sells a variety of software including a package of popular games like "Call of Duty" and "World of Warcraft" that are optimized for the company's headset, as well as a program designed to let users control a computer with thoughts instead of a mouse or keyboard.

WSJ: Mind-Controlled Videogames Become Reality