Although residents of Princeton (Princetonians) traditionally have a strong community-wide identity, legally there is not one municipality, but two: a township and a borough. The central borough is completely surrounded by the township. The Borough seceded from the Township in 1894 in a dispute over school taxes; the two municipalities later formed the Princeton Regional Schools, and some other public services are conducted together. There have been three referenda proposing to reunite the two Princetons, but they have all been narrowly defeated. The Borough contains Nassau Street, the main commercial street, most of the University campus, and incorporated most of the urban area until the postwar suburbanization. Borough and Township now have roughly equal populations, together approaching 30,000. United States Postal Zip Codes for Princeton include 08542 (largely the Borough), 08544 (the University), and 08540. The latter covers areas outside Princeton proper, including portions of Lawrence, Hopewell, and West Windsor Townships in Mercer County, Montgomery and Franklin Townships in Somerset County, and Plainsboro and South Brunswick Townships in Middlesex County. The resulting ambiguity is exploited by local real estate agents who will often advertise a property in these neighboring communities as having a "prestigious Princeton address".[3][4] Further adding to confusion is the spread of "Princeton" as part of business, church and residential development even further beyond the boundaries of the Township and Borough. Princeton lies at latitude 40��21' North, longitude 74��40' West. The term viral is used to describe anything related to viruses. Viral may also mean. newprinceton