William Rosenberg, the food franchising pioneer who founded the Dunkin' Donuts chain has died at the age of 86.

Dunkin’ Donuts, now owned by Allied Domecq, is the world's largest coffee and baked goods chain, with approximately 5,000 locations worldwide.

Rosenberg opened his first coffee and doughnut shop, called the Open Kettle, in Quincy in 1948.

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