Electro-Motive Diesel (EMD) is a manufacturer of diesel-electric locomotives and engines, primarily used in the railroad industry. Founded in 1922, EMD became a key player in locomotive technology, known for its powerful and efficient engines. The company has produced various models that have been widely adopted by railroads around the world. In 2005, EMD was acquired by Progress Rail Services, a subsidiary of Caterpillar Inc.. This acquisition allowed EMD to continue innovating in locomotive design and production, focusing on sustainability and performance. Today, EMD remains a significant contributor to the rail industry, providing reliable solutions for freight and passenger transportation.