What robot is this?

…On the VillainSupply.com customer of the Month page, they feature a photo of a robotic villain they call “The Pawn.” Now, I know I’ve seen this robot before, in real life. Well, not with my own eyes, I mean on a Documentary, or something. It was designed for shuttling documents around office buildings, back in the 1980s. But I’ll be damned if I can remember the name of it.
So, can anyone ID this 'bot for me?

Ranchoth

It’s an Androbot, created in the mid-eighties by Nolan Bushnell, founder of Atari. Dozens of people notice; fewer buy.