Inspired by the Pip-Boy from Fallout 3, modified to fit Wes's needs. Unlike the Pip-boy, Wes's Pip (he doesn't use boy in the name, he finds it stupid) has an advanced AI CPU chip within it, the AI in the Pip is a bit stubborn and fun-seeking, but the AI and Wes tend to get along very well, although the AI will not hesitate to put Wes in a funny situation should the occasion arise. The AI does has a slight Irish accent too.

Edit: Darn my craptastic spelling, I meant forearm in the picture text! >..<