I am Michael Widjaja, retired Partner after 25+ years consultancy with Accenture. I was leading Technology Architecture Practice within Europe till 2010 and then for Latin America. Worked with 100+ companies across the world, advising them on IT, Technology & Enterprise Architectures. Always want to make complex things look simple and therefore this Guide to Practical and Pragmatic IT Architecture Design to design IT architectures for simple as well as complex applications. Now spending time with family and co-founded InAdvance Consulting Group, and as its managing director, I am sitting in number of IT advisory committees and steering groups to help large companies with IT guidance. Material is free to use, but as a courtesy, please do refer ITarch.info.