What is "roomba"

Roomba was introduced in September 2002. , over 10 million units have been sold worldwide. Roomba features a set of basic sensors that enable it perform its tasks. For instance, the Roomba is able to change direction on encountering obstacles, to detect dirty spots on the floor, and to sense steep drops to keep it from falling down stairs. It uses two independently operating wheels that allow 360° turns in place. Additionally, it can adapt to perform other more creative tasks using an embedded computer in conjunction with the Roomba Open Interface.