an operating system for the Cambridge CAP Computer, his contributions to the Cambridge Model Distributed System and the Advanced Networked Systems Architecture. Advanced Networked Systems Architecture The Advanced Networked Systems Architecture (ANSA) was an applied research programme starting in the 1980s as part of the UK Alvey Programme. ANSA aimed to develop a distributed systems software architecture to support applications integration in enterprise-wide systems. The ANSA work included support for interactive multi-media services, object technology for World Wide Web applications, distributed systems management, mobile object systems and security for electronic commerce. ANSA was an early example of what became known as 'middleware'. In the 1990s "ANSAWare" software based on the ANSA architecture was used by many organisations ahead of the widespread availability of commercial, CORBA-based products for distributed computing. Notable successes included the NASA Astrophysics Data System (ADS), a European radio pager system and the online customer service system for a major UK utility. As part of his ANSA work, Herbert played an active role in many standards and consortia for distributed computing including TINA-C, RM-ODP, OSF DCE and OMG CORBA. Herbert created a Cambridge UK company, called Architecture Projects Management Ltd (APM), to employ the ANSA research team. As ANSA matured APM developed a parallel software consulting business to help companies adopt ANSA ideas and exploit ANSAware, CORBA and Internet technologies. A key development during this period was E2S, a smart card-based architecture for end-to-end secure business-to-business transactions. In 1996 APM spun out further business called Digitivity, with offices in Cambridge UK and Palo Alto, California, USA to develop an Internet browser security product. In 1998 APM and Digitivity were acquired by Citrix Systems of Ft Lauderdale, Florida, USA and Herbert took up the position of Director for Advanced Technologies where he remained until joining Microsoft in 2001. Publications Herbert published several books and articles, a selection: 1979. The Cambridge CAP Computer and Its Operating System. With Maurice Wilkes and Roger Needham (ed.) 1984. Cambridge distributed computing system. With Roger Needham 2004. Computer systems : theory, technology, and applications : a tribute to Roger Needham . With Karen Spärck Jones (ed.) References 1954 births Alumni of the University of Leeds British computer scientists Fellows of the British Computer Society Fellows of Wolfson College, Cambridge Living people Members of the University of Cambridge Computer Laboratory Microsoft employees Alumni of St John's College, Cambridge Officers of the Order of the British