The BASIC Stamp is a microcontroller with a small, specialized BASIC interpreter (PBASIC) built into ROM. It is made by Parallax, Inc. and has been popular with electronics hobbyists, robotic designers since the early 1990’s because of its low threshold of learning and ease of use due to its simple to understand BASIC language and excellent documentation. It is called a “Stamp” simply because it is close to the size of an average postage  stamp.