In seeking companies to purchase or invest in, private equity firms have focused on a number of broad categories including: struggling and underperforming businesses (e.g. Toys ‘R Us); unwanted divisions of large conglomerates, such as Dunkin Donuts or Burger King; promising or strong companies in need of venture or growth capital, such as Google, Microsoft, NASDAQ, Opera software, Trolltech and family businesses where the founders are seeking to transition beyond family ownership, like Hilton Hotels.