A book giving descriptions of major American businesses, institutions, and communities.

I want to get a better understanding of all the different groups of people and organizations in the US. I tried googling this but only got books talking about business or government in general. What I want is a long book that gives a short rundown/description of the most important information to know about each major businesses/corporations and government institutions. Maybe also some talk about major churches, universities, or political groups, but with a focus on the organizations themselves, rather than abstract goals.

Thank you for the help.