Technological convergence is a term that describes the layers of abstraction that enable different technologies to interoperate efficiently as a converged system.
Vendor lock-in is a situation in which a customer using a product or service cannot easily transition to a competitor’s product or service.
VersaStack is a converged infrastructure reference architecture developed as a collaborative effort of IBM and Cisco. A converged infrastructure (CI) reference architecture is a document specifying the design, components and configuration of a CI system.
VMware EVO:RAIL is a set of hyper-converged infrastructure appliances VMware sold with hardware partners from 2014 to 2016.