Correct me if I'm wrong, but today's "United" feels very much like Continental Airlines. Having said that, the PMUA also used to remind me of Pan Am, because I used to fly Pan Am on TPAC routes, until Pan Am sold the Pacific to United. (years later, Pan Am sold the Atlantic to Delta, which also absorbed Northwest, which also had a large TPAC operation)

Is there a family tree that will show me how many former airlines(part or whole) make up today's United Airlines?