Harland & Wolff Heavy Industries is a British heavy industrial company, specializing in shipbuilding and offshore construction, located in Belfast, Northern Ireland. Harland & Wolff is most famous for having built all of the ships intended for the White Star Line including the ill-fated RMS Titanic. Other well known ships built by Harland & Wolff include Titanic's sister ships RMS Olympic and RMS Britannic, the Royal Navy's HMS Belfast, Royal Mail Line's Andes, Shaw Savill's Southern Cross, Union-Castle's RMS Pendennis Castle, and P&O's Canberra. Harland and Wolff's official history, Shipbuilders to the World, was published in 1986.

As of 2011, the expanding offshore wind power industry has been the prime focus, and 75% of the company's work is based on offshore renewable energy.

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