Data Access Worldwide of Miami, USA is the company behind the studio and language and built its business up around the console mode [[DataFlex]] language which was released prior to DOS and competed with DBase2[[dBase|dBase II]] in early microcomputer technology. The first attempt at a windows product was ''DataFlex for Windows'' which failed as it was a sort of windows bolted on top of DOS product. Then they released Visual DataFlex 4.0 in 1997 which allowed users to write native 32 bits Windows applications. Every 6 months a new revision level is released. Visual DataFlex is now in revision 15, named VDF 2009<Ref>[http://http://www.visual-dataflex.co.uk/Include/ElectosFileStreaming.asp?FileId=861 Visual DataFlex 2009/15.0 – Overview]</Ref>, and features a datadictionary layer of business rules which is of dual use with the windows product and the webapp extension.