Complex sentence: In 1979 the company started to deliver products in tin boxes by mail orders, it opened Gourmet Department headed by Michael DiCamillo and catered to gourmet departments at Saks Fifth Avenue, Macy's, Bloomingdale's in New York and Marshall Field's in Chicago.
Split into simpler sentences: In 1979 the company started to deliver products in tin boxes by mail orders. It opened a Gourmet Department headed by Michael DiCamillo and catered to gourmet departments at Saks Fifth Avenue, Macy's, Bloomingdale's in New York and Marshall Field's in Chicago.