Modulus is a robot designed for adaptation to the widest possible range of applications with its modular Techno-Cake system, robot parts and accessories. Modularity, hence its name, is one of its principal characteristics. Available in three configurations - Base, Service & Security, and Moddy. The first Base unit can be added to for different functions. As it stands, it can be used in hobbies as a home computer, self propelled peripheral, and can be useful to people wanting to learn how to program robots. The simplest attachments which can be connected to the Base unit are a vacuum cleaner and a plotter-mechanism that uses felt-tip pens to produce drawings of considerable precision.