Roland Piquepaille writes "Molecular computing is a fascinating subject that I already covered several times (check here or there for example). Now, researchers from France and England are going further computing. They want to make logic circuits by linking individual molecules. They even think that they can build these logic circuits within a single one, according to this article from Technology Research News. But challenges remain and practical applications will not appear before at least ten years. This overview contains more details and references about these findings. It also includes an amazing diagram showing a benzene molecule configured as an XOR logic gate."