The Electrolux Trilobite is a robotic vacuum cleaner manufactured by the Swedish corporation Electrolux. It takes its name from the extinct arthropod, which scoured the ocean's floor. The prototype cleaner was first seen on the BBC television programme, Tomorrow's World, in May 1996, when it was demonstrated by presenter Philippa Forrester (actually announced by press release in the UK on 1 Dec 1997 ). It was the world's first commercially available autonomous vacuum cleaner, introduced as a product in 2001, model ZA1. A revision was released as Version 2.0 in 2004, model ZA2.