Banyan VINES (for Virtual Integrated Network Service) was a computer network operating system and the set of computer network protocols it used to talk to client machines on the network. Banyan Systems ran as a collection of services on top of AT&T System 5 Unix, and based its core network protocols on the archetypical Xerox XNS stack. VINES formed one of a group of XNS-based systems which also included Novell NetWare and ARCNET; like most of these earlier products it has since disappeared from the market, Banyan along with it.James Allchin, who has since worked as Group Vice President for Platforms at Microsoft Corporation until his retirement in January 30, 2007, worked as the chief architect of Banyan VINES.