As is the case with most technology products, key personnel behind OpenLink Virtuoso, InnoDB, and Solid share periods of professional overlap that provide noteworthy insight into the history of database technology development in Finland. Heikki Tuuri (creator of InnoDB), Ora Lassila (W3C and Nokia Research, a technology lead and visionary in the areas RDF and Semantic Web in general alongside Tim Berners-Lee), and Orri Erling (Virtuoso Program Manager at OpenLink Software) all worked together in a startup company called Entity Systems in Finland – where they were developing Common Lisp and Prolog development environments for the early generation of PC's circa. 1986–88.