The Class M-3 Model B-9 General Utility Non-Theorizing Environmental Control Robot, but I like Dr. Smith's nickname for him: Cantankerous Cold-Hearted Clod. And, yes, somebody actually wrote down all the insulting names Dr. Smith called the Robot,

http://www.actuarialoutpost.com/actuarial_discussion_forum/showthread.php?t=200221

See what people are driven to do, when they have not discovered the hobby of chip collecting?