name some employees who worked in that company.
J. Edgar Thomson.
Pennsylvania Railroad
Thomson (1808–1874) was the entrepreneur who led the Pennsylvania Railroad from 1852 until his death in 1874, making it the largest business enterprise in the world and a world-class model for technological and managerial innovation. He served as the Pennsy's first Chief Engineer and third President. 
what is the horseshoe curve in pennsylvania? It is a three-track railroad curve on Norfolk Southern Railway's Pittsburgh Line in Blair County. what is the total length of it? UNANSWERABLE who designed it? UNANSWERABLE which company built this? The Pennsylvania Railroad. which year was it opened to the public? February 15th, 1854. can you name a few railway stations from this line? The Harrisburg Terminal and the Enola Yard. is there any mountain close to that curve? Yes, the Allegheny Mountains. can you tell me some other construction projects from that company? Passenger stations and freight equipment. can you name any one in particular? No.
wiki:4726893
Pennsylvania Railroad [SEP] J. Edgar Thomson
Thomson (1808–1874) was the entrepreneur who led the Pennsylvania Railroad from 1852 until his death in 1874, making it the largest business enterprise in the world and a world-class model for technological and managerial innovation. He served as the Pennsy's first Chief Engineer and third President. Thomson's sober, technical, methodical, and non-ideological personality had an important influence on the Pennsylvania Railroad, which in the mid-19th century was on the technical cutting edge of rail development, while nonetheless reflecting Thomson's personality in its conservatism and its steady growth while avoiding financial risks. His Pennsylvania Railroad was in his day the largest railroad in the world, with 6,000 miles of track, and was famous for steady financial dividends, high quality construction, constantly improving equipment, technological advances (such as replacing wood fuel with coal), and innovation in management techniques for a large complex organization.