The Romulus b-rep solid modeler (or simply Romulus) was released in 1978 by Ian Braid, Charles Lang, Alan Grayer, and the Shape Data team in Cambridge, England.[1] It was the first commercial solid modeling kernel designed for straightforward integration into CAD software. Romulus incorporated the CAM-I AIS[2] (Computer Aided Manufacturers International's Application Interface Specification) and was the only solid modeler (other than its successors Parasolid and ACIS) ever to offer a third-party standard API to facilitate high-level integration into a host CAD software program. Romulus was quickly licensed by Siemens, HP and several other CAD software vendors.