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UTC Fire & Security products include fire and special hazard and suppression systems and firefighting equipment, security, monitoring and rapid response systems and service and security personnel for a diversified international customer base principally in the industrial, commercial and residential property sectors. 

Pratt & Whitney products include commercial, military, business jet and general aviation aircraft engines, parts and services, industrial gas turbines, geothermal power systems and space propulsion sold to a diversified customer base, including international and domestic commercial airlines and aircraft leasing companies, aircraft manufacturers, and U.S. and foreign governments. Pratt & Whitney also provides product support and a full range of overhaul, repair and fleet management services and produces land-based power generation equipment. 

Hamilton Sundstrand provides aerospace and industrial products and aftermarket services for diversified industries worldwide. Aerospace products include power generation, management and distribution systems, flight systems, engine control systems, environmental control systems, fire protection and detection systems, auxiliary power units and propeller systems. Industrial products include air compressors, metering pumps and heavy duty process pumps. 

Sikorsky products include military and commercial helicopters, aftermarket helicopter and aircraft parts and services. 

On September 28, 2011, we announced a new organizational structure to better serve customers and drive growth and achieve greater efficiencies through greater integration across certain product lines. This new structure combines Carrier and UTC Fire & Security into a new segment called UTC Climate, Controls & Security. Beginning with the first quarter of 2012, Carrier and UTC Fire & Security will report combined financial and operational results as part of this new segment. As part of this new organizational structure, we also created UTC Propulsion & Aerospace Systems, a new organization consisting of Pratt & Whitney and Hamilton Sundstrand. Pratt & Whitney and Hamilton Sundstrand will continue to report their financial and operational results as separate segments, which is consistent with how we will allocate resources and measure the financial performance of these businesses. We have reported our financial and operational results for the periods presented herein under the six principal segments noted above, consistent with how we have reviewed our business operations for decision-making purposes, resource allocation and performance assessment during 2011. 

Segment Information. Total sales by segment include intersegment sales, which are generally made at prices approximating those that the selling entity is able to obtain on external sales. Segment information for the years ended December 31 is as follows: 

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