Question:  Downtown Jacksonville features offices for major corporations such as CSX Corporation, an American holding company focused on what?
Context: Michael J. Ward has been the Chairman and CEO of CSX Corporation, a holding company focused on real estate and railroads, since 2003. Downtown Jacksonville is the historic core and central business district (CBD) of Jacksonville, Florida USA.  It comprises the earliest area of the city to be developed and is located in its geographic center along the narrowing point of the St. Johns River.  There are various definitions of what constitutes Jacksonville's downtown; the one used by the city government and other entities defines it as including five districts: the Downtown Core (or Northbank), the Southbank, LaVilla, Brooklyn, and the Sports Complex.  The area features offices for major corporations such as CSX Corporation, Fidelity National Financial, EverBank, Bank of America, Prudential Financial, Wells Fargo, AT&T, and Aetna. The Transamerica Corporation is an American holding company for various life insurance companies and investment firms operating primarily in the United States, offering life and supplemental health insurance, investments, and retirement services.  The company’s main offices are in Baltimore, Denver, and Cedar Rapids, Iowa, with affiliated offices located throughout the United States.  In 1999, it became a subsidiary of Aegon, a European financial services company headquartered in The Hague, Netherlands. The CSX Corporation is an American holding company focused on real estate and railways in North America, among other industries.  The company was established in 1978 as part of the Chessie System and Seaboard Coast Line Industries merger.  The Chessie System and Seaboard Coast Line Industries which includes all railroads of both companies became subsidiaries of the CSX Corporation and both companies were merged into the CSX Corporation in 1980, the third year that the CSX Corporation was in operation. The Jacksonville Port Terminal Railroad (reporting mark JXPT) is a short line terminal railroad run by Watco Companies.  It serves the Jacksonville Port Authority and tenants with over ten miles of track.  It has only one main line, running west from the "Tallyrand Marine Terminal" on the St. Johns River to an interchange with CSX and Norfolk Southern northeast of downtown Jacksonville, Florida.  Formerly known as the Talleyrand Terminal Railroad.  Operations began on July 28, 1996 under that name.   On March 8th, 2017, Watco bought the railroad and renamed it the Jacksonville Port Terminal Railroad.   CSX Transportation (reporting mark CSXT) is a Class I railroad in the United States.  The main subsidiary of the CSX Corporation, the railroad is headquartered in Jacksonville, Florida, and owns about 21,000 route miles (34,000 km).  CSX operates one of the three Class I railroads serving most of the East Coast, the other two being the Norfolk Southern Railway (NS) and Canadian Pacific Railway.  It also serves the Canadian provinces of Ontario and Quebec.  Together CSX and Norfolk Southern Railway have a duopoly over all east-west freight rail traffic east of the Mississippi River.  As of August 8, 2017, CSX's total public stock value was slightly over $41.5 billion. The CSX Transportation Building is a 251 ft high-rise office building located in Jacksonville, Florida.  Completed in 1960, the building currently serves as headquarters for CSX Corporation.  The building is located in the Northbank area of Downtown Jacksonville, along the banks of the St. Johns River.  Its former names include Atlantic Coast Line Building and Seaboard Coastline Railroad Building.  Designed by KBJ Architects, the CSX Transportation Building is a LEED certified building and is an iconic example of Mid-century modern and International style architecture. P&L Transportation, Inc., formerly Four Rivers Transportation, Inc., based in Wilmington, Delaware, is a railroad holding company in the United States.  It is jointly-owned by the management of the P&L Railway, as well as CSX Corporation, which the latter holds a majority. Downtown Pittsburgh, colloquially referred to as the Golden Triangle or Dahntahn in eye dialect, and officially the Central Business District, is the urban downtown center of Pittsburgh.  It is located at the confluence of the Allegheny River and the Monongahela River whose joining forms the Ohio River.  The "triangle" is bounded by the two rivers.  The area features offices for major corporations such as PNC Bank, U.S. Steel, PPG, Bank of New York Mellon, Heinz, Federated Investors and Alcoa.  It is where the fortunes of such industrial barons as Andrew Carnegie, Henry Clay Frick, Henry J. Heinz, Andrew Mellon and George Westinghouse were made.  It contains the site where the French fort, Fort Duquesne, once stood. The Florida Interurban Railway and Tunnel Company was incorporated in 1912 by the Bates Real Estate Interests and partners, which had extensive backgrounds in railroading with the Seaboard Air Line Railroad.  It is not known if the company was a 'front' for Seaboard expansion into new markets but the use of a front company has been a common practice in Florida.  The railway was to link Jacksonville with both St. Augustine and Pablo Beach (later named: Jacksonville Beach) with a 45-mile rail network.  The tunnel would have had the additional bonus of being the first man-made crossing of the St. Johns River and was planned for interurbans and streetcars as well as automobiles and pedestrians.  The opening of the St. Elmo Acosta toll Bridge in 1921 connected both sides of the river and it was used by streetcars, automobiles and pedestrians.  Nothing more was heard from the FIR&T Company, but several more interurban schemes played into the area's electric railway history.  Jacksonville Traction Company itself incorporated the Duval Traction Company which in 1918 completed a line from downtown Jacksonville to Camp Johnston (today's NAS JAX) near the Clay County line.  The South Jacksonville municipal Railways flush with cash after linking Jacksonville and South Jacksonville extended its lines to both St. Nicholas and San Jose, which was then considered 'far out in the country.'
Answer: real estate and railways