Global Map of IT

I’m looking for a map (or other types of overviews) that shows (almost) all aspects (technologies (e.g. Java), platforms (e.g. AS/400), os (e.g. LINUX), themes (e.g. ERP, CRM) in one “big picture”. (I am thinking of a large poster that can be put onthe wall)

Do you know any source (or are you the source) where I can get this information from ?