Sten Sundblad and his son, Per, are co-owners of ADB-Arkitektur, a Swedish company that teaches methods for effective Windows DNA and client/server development with products and technologies such as COM +, Microsoft Transaction Server. Microsoft SQL Server TM, and Visual Basic. Sten's expertise includes object and component oriented analysis and design, as well as data modeling, while Per's expertise includes developrnent of three-tier client/server solutions.