The Pennsylvania Railroad Commonly referred to as the "Pennsy."The PRR was the largest railroad by traffic and revenue in the U.S. for the first half of the twentieth century. Over the years, it acquired, merged with or owned part of at least 800 other rail lines and companies.
The Union Pacific steam-electric locomotive is the conception originally-of the General Electric
Company, requiring for fulfilment a railway to purchase and co-operate in the design and continued development of this motive power unit. This the Union Pacific agreed to do, coinciding as it does with its progressive policy.