Color televison, the videotape recorder, and the liquid crystal display were invented in New Jersey corporate research labs. Today telecommunications and biotechnology are major industries in the state, and the area near Princeton has developed into a notable high-tech center. Finance, warehousing, and big box retailing have also become important to the state's economy, attracting corporations and shoppers and to a large extent reversing New Jersey's onetime role as a suburb for commuters to New York City and Philadelphia. A tremendous transportation system, concentrated in the industrial lowlands, moves products and a huge volume of interstate traffic through the state. Busy highways like the Garden State Parkway and the New Jersey Turnpike are part of a network of toll roads and freeways.
New Jersey is linked to Delaware and Pennsylvania by many bridges across the Delaware River.
Traffic to and from New York is served by railway and subway tunnels and by the facilities of the Port Authority of New York and New Jersey -the George Washington Bridge, the Lincoln and Holland vehicular tunnels, and three bridges to Staten Island. This extensive transportation network also serves to maintain New Jersey's well-known vacation industry, reaching ocean beaches, inland lakes, forests, and mountain resort areas. Atlantic City 's emergence as a casino gambling center has made it the largest visitor destination in the state. In addition to being a center of industry, transportation, and tourism, New Jersey is a leading state in agricultural income per acre. The scrub pine area of the southern inland region is used for cranberry and blueberry culture.